1164521280 has 224 divisors, whose sum is σ = 4155911424. Its totient is φ = 274120704.

The previous prime is 1164521273. The next prime is 1164521287. The reversal of 1164521280 is 821254611.

It is an interprime number because it is at equal distance from previous prime (1164521273) and next prime (1164521287).

It is a super-2 number, since 2×1164521280² = 2712219623145676800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1164521287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 285012 + ... + 289068.

It is an arithmetic number, because the mean of its divisors is an integer number (18553176).

Almost surely, 2^1164521280 is an apocalyptic number.

1164521280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1164521280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2077955712).

1164521280 is an abundant number, since it is smaller than the sum of its proper divisors (2991390144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1164521280 is a wasteful number, since it uses less digits than its factorization.

1164521280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113 (or 4103 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1164521280 is about 34125.0828570423. The cubic root of 1164521280 is about 1052.0809163473.

Adding to 1164521280 its reverse (821254611), we get a palindrome (1985775891).

The spelling of 1164521280 in words is "one billion, one hundred sixty-four million, five hundred twenty-one thousand, two hundred eighty".