3157561 has 8 divisors (see below), whose sum is σ = 3469248. Its totient is φ = 2850000.

The previous prime is 3157547. The next prime is 3157571. The reversal of 3157561 is 1657513.

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

It is a cyclic number.

It is not a de Polignac number, because 3157561 - 2¹¹ = 3155513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3157501) 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, 711 + ... + 2611.

It is an arithmetic number, because the mean of its divisors is an integer number (433656).

Almost surely, 2^3157561 is an apocalyptic number.

It is an amenable number.

3157561 is a deficient number, since it is larger than the sum of its proper divisors (311687).

3157561 is a wasteful number, since it uses less digits than its factorization.

3157561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063.

The product of its digits is 3150, while the sum is 28.

The square root of 3157561 is about 1776.9527286903. The cubic root of 3157561 is about 146.7069144594.

The spelling of 3157561 in words is "three million, one hundred fifty-seven thousand, five hundred sixty-one".