1101601280 has 160 divisors (see below), whose sum is σ = 2887315200. Its totient is φ = 400637952.

The previous prime is 1101601229. The next prime is 1101601283. The reversal of 1101601280 is 821061011.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-3 number, since 3×1101601280³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1101601283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2628911 + ... + 2629329.

It is an arithmetic number, because the mean of its divisors is an integer number (18045720).

Almost surely, 2^1101601280 is an apocalyptic number.

1101601280 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 1101601280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1443657600).

1101601280 is an abundant number, since it is smaller than the sum of its proper divisors (1785713920).

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

1101601280 is an equidigital number, since it uses as much as digits as its factorization.

1101601280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 1101601280 is about 33190.3793289562. The cubic root of 1101601280 is about 1032.7807724474.

Adding to 1101601280 its reverse (821061011), we get a palindrome (1922662291).

The spelling of 1101601280 in words is "one billion, one hundred one million, six hundred one thousand, two hundred eighty".