1160621561 has 8 divisors (see below), whose sum is σ = 1321182144. Its totient is φ = 1009235920.

The previous prime is 1160621551. The next prime is 1160621573. The reversal of 1160621561 is 1651260611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1160621561 - 2²⁶ = 1093512697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1160621521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2293466 + ... + 2293971.

It is an arithmetic number, because the mean of its divisors is an integer number (165147768).

Almost surely, 2^1160621561 is an apocalyptic number.

1160621561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1160621561 is a deficient number, since it is larger than the sum of its proper divisors (160560583).

1160621561 is a wasteful number, since it uses less digits than its factorization.

1160621561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587471.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1160621561 is about 34067.8963395159. The cubic root of 1160621561 is about 1050.9052091118.

The spelling of 1160621561 in words is "one billion, one hundred sixty million, six hundred twenty-one thousand, five hundred sixty-one".