102399845 has 8 divisors (see below), whose sum is σ = 123559800. Its totient is φ = 81466560.

The previous prime is 102399827. The next prime is 102399859. The reversal of 102399845 is 548993201.

It can be written as a sum of positive squares in 4 ways, for example, as 25921 + 102373924 = 161^2 + 10118^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102399845 - 2⁸ = 102399589 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55670 + ... + 57479.

It is an arithmetic number, because the mean of its divisors is an integer number (15444975).

Almost surely, 2^102399845 is an apocalyptic number.

It is an amenable number.

102399845 is a deficient number, since it is larger than the sum of its proper divisors (21159955).

102399845 is a wasteful number, since it uses less digits than its factorization.

102399845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113335.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 102399845 is about 10119.2808538947. The cubic root of 102399845 is about 467.8426020604.

The spelling of 102399845 in words is "one hundred two million, three hundred ninety-nine thousand, eight hundred forty-five".