15940425 has 24 divisors (see below), whose sum is σ = 26489376. Its totient is φ = 8458240.

The previous prime is 15940409. The next prime is 15940429. The reversal of 15940425 is 52404951.

It is not a de Polignac number, because 15940425 - 2⁴ = 15940409 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15940392 and 15940401.

It is not an unprimeable number, because it can be changed into a prime (15940429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18862 + ... + 19688.

It is an arithmetic number, because the mean of its divisors is an integer number (1103724).

Almost surely, 2^15940425 is an apocalyptic number.

15940425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15940425 is a deficient number, since it is larger than the sum of its proper divisors (10548951).

15940425 is a wasteful number, since it uses less digits than its factorization.

15940425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 15940425 is about 3992.5461800711. The cubic root of 15940425 is about 251.6710718544.

The spelling of 15940425 in words is "fifteen million, nine hundred forty thousand, four hundred twenty-five".