102140025 has 24 divisors (see below), whose sum is σ = 181863360. Its totient is φ = 50283840.

The previous prime is 102140011. The next prime is 102140041. The reversal of 102140025 is 520041201.

It is not a de Polignac number, because 102140025 - 2⁵ = 102139993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102139986 and 102140013.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51405 + ... + 53354.

It is an arithmetic number, because the mean of its divisors is an integer number (7577640).

Almost surely, 2^102140025 is an apocalyptic number.

102140025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102140025 is a deficient number, since it is larger than the sum of its proper divisors (79723335).

102140025 is a wasteful number, since it uses less digits than its factorization.

102140025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104785 (or 104780 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 102140025 is about 10106.4348313339. The cubic root of 102140025 is about 467.4465799199.

Adding to 102140025 its reverse (520041201), we get a palindrome (622181226).

The spelling of 102140025 in words is "one hundred two million, one hundred forty thousand, twenty-five".