102451640 has 16 divisors (see below), whose sum is σ = 230516280. Its totient is φ = 40980640.

The previous prime is 102451633. The next prime is 102451649. The reversal of 102451640 is 46154201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102451649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280606 + ... + 1280685.

Almost surely, 2^102451640 is an apocalyptic number.

102451640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102451640 is an abundant number, since it is smaller than the sum of its proper divisors (128064640).

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

102451640 is a wasteful number, since it uses less digits than its factorization.

102451640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561302 (or 2561298 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 102451640 is about 10121.8397537207. The cubic root of 102451640 is about 467.9214687916.

The spelling of 102451640 in words is "one hundred two million, four hundred fifty-one thousand, six hundred forty".