102165040 has 20 divisors (see below), whose sum is σ = 237533904. Its totient is φ = 40865984.

The previous prime is 102165031. The next prime is 102165043. The reversal of 102165040 is 40561201.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 102164999 and 102165017.

It is not an unprimeable number, because it can be changed into a prime (102165043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638452 + ... + 638611.

Almost surely, 2^102165040 is an apocalyptic number.

102165040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102165040 is an abundant number, since it is smaller than the sum of its proper divisors (135368864).

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

102165040 is a wasteful number, since it uses less digits than its factorization.

102165040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277076 (or 1277070 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 102165040 is about 10107.6723334307. The cubic root of 102165040 is about 467.4847374124.

The spelling of 102165040 in words is "one hundred two million, one hundred sixty-five thousand, forty".