102642534 has 12 divisors (see below), whose sum is σ = 222392196. Its totient is φ = 34214172.

The previous prime is 102642521. The next prime is 102642539. The reversal of 102642534 is 435246201.

102642534 is a `hidden beast` number, since 10 + 2 + 642 + 5 + 3 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 102642498 and 102642507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102642539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2851164 + ... + 2851199.

It is an arithmetic number, because the mean of its divisors is an integer number (18532683).

Almost surely, 2^102642534 is an apocalyptic number.

102642534 is an abundant number, since it is smaller than the sum of its proper divisors (119749662).

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

102642534 is a wasteful number, since it uses less digits than its factorization.

102642534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5702371 (or 5702368 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 102642534 is about 10131.2651727215. The cubic root of 102642534 is about 468.2119081984.

Adding to 102642534 its reverse (435246201), we get a palindrome (537888735).

The spelling of 102642534 in words is "one hundred two million, six hundred forty-two thousand, five hundred thirty-four".