102542947 has 36 divisors (see below), whose sum is σ = 123057984. Its totient is φ = 85250880.

The previous prime is 102542903. The next prime is 102542987. The reversal of 102542947 is 749245201.

It is not a de Polignac number, because 102542947 - 2⁷ = 102542819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102542987) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2771413 + ... + 2771449.

Almost surely, 2^102542947 is an apocalyptic number.

102542947 is a deficient number, since it is larger than the sum of its proper divisors (20515037).

102542947 is a wasteful number, since it uses less digits than its factorization.

102542947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 102542947 is about 10126.3491446819. The cubic root of 102542947 is about 468.0604345824.

The spelling of 102542947 in words is "one hundred two million, five hundred forty-two thousand, nine hundred forty-seven".