102400025 has 96 divisors (see below), whose sum is σ = 173322240. Its totient is φ = 58164480.

The previous prime is 102400021. The next prime is 102400031. The reversal of 102400025 is 520004201.

It is not a de Polignac number, because 102400025 - 2² = 102400021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102399982 and 102400009.

It is not an unprimeable number, because it can be changed into a prime (102400021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 994124 + ... + 994226.

It is an arithmetic number, because the mean of its divisors is an integer number (1805440).

Almost surely, 2^102400025 is an apocalyptic number.

It is an amenable number.

102400025 is a deficient number, since it is larger than the sum of its proper divisors (70922215).

102400025 is a wasteful number, since it uses less digits than its factorization.

102400025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 102400025 is about 10119.2897478034. The cubic root of 102400025 is about 467.8428761872.

Adding to 102400025 its reverse (520004201), we get a palindrome (622404226).

The spelling of 102400025 in words is "one hundred two million, four hundred thousand, twenty-five".