1560161261 has 4 divisors (see below), whose sum is σ = 1569503712. Its totient is φ = 1550818812.

The previous prime is 1560161257. The next prime is 1560161279. The reversal of 1560161261 is 1621610651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1560161261 - 2² = 1560161257 is a prime.

It is a super-2 number, since 2×1560161261² = 4868206320650220242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1560161761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4670975 + ... + 4671308.

It is an arithmetic number, because the mean of its divisors is an integer number (392375928).

Almost surely, 2^1560161261 is an apocalyptic number.

It is an amenable number.

1560161261 is a deficient number, since it is larger than the sum of its proper divisors (9342451).

1560161261 is an equidigital number, since it uses as much as digits as its factorization.

1560161261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9342450.

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

The square root of 1560161261 is about 39498.8767055470. The cubic root of 1560161261 is about 1159.8179611785.

The spelling of 1560161261 in words is "one billion, five hundred sixty million, one hundred sixty-one thousand, two hundred sixty-one".