102540540 has 24 divisors (see below), whose sum is σ = 287113680. Its totient is φ = 27344128.

The previous prime is 102540539. The next prime is 102540589. The reversal of 102540540 is 45045201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854445 + ... + 854564.

It is an arithmetic number, because the mean of its divisors is an integer number (11963070).

Almost surely, 2^102540540 is an apocalyptic number.

102540540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102540540 is an abundant number, since it is smaller than the sum of its proper divisors (184573140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102540540 is a wasteful number, since it uses less digits than its factorization.

102540540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709021 (or 1709019 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 102540540 is about 10126.2302956233. The cubic root of 102540540 is about 468.0567722785.

Adding to 102540540 its reverse (45045201), we get a palindrome (147585741).

The spelling of 102540540 in words is "one hundred two million, five hundred forty thousand, five hundred forty".