157801 has 4 divisors (see below), whose sum is σ = 180352. Its totient is φ = 135252.

The previous prime is 157799. The next prime is 157813. The reversal of 157801 is 108751.

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 157801 - 2¹ = 157799 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157831) 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, 11265 + ... + 11278.

It is an arithmetic number, because the mean of its divisors is an integer number (45088).

2¹⁵⁷⁸⁰¹ is an apocalyptic number.

It is an amenable number.

157801 is a deficient number, since it is larger than the sum of its proper divisors (22551).

157801 is an equidigital number, since it uses as much as digits as its factorization.

157801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22550.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 157801 is about 397.2417400022. The cubic root of 157801 is about 54.0384956416.

The spelling of 157801 in words is "one hundred fifty-seven thousand, eight hundred one".