157565 has 4 divisors (see below), whose sum is σ = 189084. Its totient is φ = 126048.

The previous prime is 157561. The next prime is 157571. The reversal of 157565 is 565751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17689 + 139876 = 133^2 + 374^2 .

It is a cyclic number.

It is not a de Polignac number, because 157565 - 2² = 157561 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157561) 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, 15752 + ... + 15761.

It is an arithmetic number, because the mean of its divisors is an integer number (47271).

2¹⁵⁷⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

157565 is a deficient number, since it is larger than the sum of its proper divisors (31519).

157565 is an equidigital number, since it uses as much as digits as its factorization.

157565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31518.

The product of its digits is 5250, while the sum is 29.

The square root of 157565 is about 396.9445805147. The cubic root of 157565 is about 54.0115430285.

The spelling of 157565 in words is "one hundred fifty-seven thousand, five hundred sixty-five".