157862021 has 4 divisors (see below), whose sum is σ = 158239200. Its totient is φ = 157484844.

The previous prime is 157862011. The next prime is 157862053. The reversal of 157862021 is 120268751.

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 a de Polignac number, because none of the positive numbers 2^k-157862021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157862011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187961 + ... + 188798.

It is an arithmetic number, because the mean of its divisors is an integer number (39559800).

Almost surely, 2^157862021 is an apocalyptic number.

It is an amenable number.

157862021 is a deficient number, since it is larger than the sum of its proper divisors (377179).

157862021 is an equidigital number, since it uses as much as digits as its factorization.

157862021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377178.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 157862021 is about 12564.3153812693. The cubic root of 157862021 is about 540.4546023223.

The spelling of 157862021 in words is "one hundred fifty-seven million, eight hundred sixty-two thousand, twenty-one".