102540087 has 20 divisors (see below), whose sum is σ = 164961720. Its totient is φ = 63100944.

The previous prime is 102540077. The next prime is 102540089. The reversal of 102540087 is 780045201.

It is not a de Polignac number, because 102540087 - 2⁸ = 102539831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 102540087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102540089) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47637 + ... + 49742.

It is an arithmetic number, because the mean of its divisors is an integer number (8248086).

Almost surely, 2^102540087 is an apocalyptic number.

102540087 is a deficient number, since it is larger than the sum of its proper divisors (62421633).

102540087 is an equidigital number, since it uses as much as digits as its factorization.

102540087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97404 (or 97395 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 102540087 is about 10126.2079279462. The cubic root of 102540087 is about 468.0560830226.

Adding to 102540087 its reverse (780045201), we get a palindrome (882585288).

The spelling of 102540087 in words is "one hundred two million, five hundred forty thousand, eighty-seven".