102642849 has 32 divisors (see below), whose sum is σ = 156710400. Its totient is φ = 66361680.

The previous prime is 102642779. The next prime is 102642871. The reversal of 102642849 is 948246201.

102642849 is a `hidden beast` number, since 1 + 0 + 2 + 642 + 8 + 4 + 9 = 666.

It is not a de Polignac number, because 102642849 - 2¹¹ = 102640801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102642349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244762 + ... + 245180.

It is an arithmetic number, because the mean of its divisors is an integer number (4897200).

Almost surely, 2^102642849 is an apocalyptic number.

It is an amenable number.

102642849 is a deficient number, since it is larger than the sum of its proper divisors (54067551).

102642849 is a wasteful number, since it uses less digits than its factorization.

102642849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 102642849 is about 10131.2807186456. The cubic root of 102642849 is about 468.2123871636.

The spelling of 102642849 in words is "one hundred two million, six hundred forty-two thousand, eight hundred forty-nine".