102387157 has 4 divisors (see below), whose sum is σ = 102407436. Its totient is φ = 102366880.

The previous prime is 102387137. The next prime is 102387169. The reversal of 102387157 is 751783201.

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 14945956 + 87441201 = 3866^2 + 9351^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102387157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102387137) 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, 4107 + ... + 14887.

It is an arithmetic number, because the mean of its divisors is an integer number (25601859).

Almost surely, 2^102387157 is an apocalyptic number.

It is an amenable number.

102387157 is a deficient number, since it is larger than the sum of its proper divisors (20279).

102387157 is an equidigital number, since it uses as much as digits as its factorization.

102387157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20278.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 102387157 is about 10118.6539124530. The cubic root of 102387157 is about 467.8232783589.

The spelling of 102387157 in words is "one hundred two million, three hundred eighty-seven thousand, one hundred fifty-seven".