1161204000 has 384 divisors, whose sum is σ = 4377784320. Its totient is φ = 266112000.

The previous prime is 1161203999. The next prime is 1161204007. The reversal of 1161204000 is 4021611.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161204007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2507769 + ... + 2508231.

It is an arithmetic number, because the mean of its divisors is an integer number (11400480).

Almost surely, 2^1161204000 is an apocalyptic number.

1161204000 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 1161204000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2188892160).

1161204000 is an abundant number, since it is smaller than the sum of its proper divisors (3216580320).

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

1161204000 is a wasteful number, since it uses less digits than its factorization.

1161204000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1161204000 is about 34076.4434763958. The cubic root of 1161204000 is about 1051.0809729264.

Adding to 1161204000 its reverse (4021611), we get a palindrome (1165225611).

The spelling of 1161204000 in words is "one billion, one hundred sixty-one million, two hundred four thousand".