157861287 has 12 divisors (see below), whose sum is σ = 228326904. Its totient is φ = 105100080.

The previous prime is 157861267. The next prime is 157861307. The reversal of 157861287 is 782168751.

It is a happy number.

157861287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (157861267) and next prime (157861307).

It is not a de Polignac number, because 157861287 - 2¹² = 157857191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157861217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4389 + ... + 18302.

It is an arithmetic number, because the mean of its divisors is an integer number (19027242).

Almost surely, 2^157861287 is an apocalyptic number.

157861287 is a deficient number, since it is larger than the sum of its proper divisors (70465617).

157861287 is a wasteful number, since it uses less digits than its factorization.

157861287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23470 (or 23467 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The square root of 157861287 is about 12564.2861715260. The cubic root of 157861287 is about 540.4537646830.

The spelling of 157861287 in words is "one hundred fifty-seven million, eight hundred sixty-one thousand, two hundred eighty-seven".