15320625 has 20 divisors (see below), whose sum is σ = 25529328. Its totient is φ = 8170000.

The previous prime is 15320567. The next prime is 15320633. The reversal of 15320625 is 52602351.

15320625 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15320625 - 2¹³ = 15312433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15320595 and 15320604.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2211 + ... + 5960.

Almost surely, 2^15320625 is an apocalyptic number.

15320625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15320625 is a deficient number, since it is larger than the sum of its proper divisors (10208703).

15320625 is an frugal number, since it uses more digits than its factorization.

15320625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8194 (or 8179 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 15320625 is about 3914.1569973623. The cubic root of 15320625 is about 248.3660102439.

Adding to 15320625 its reverse (52602351), we get a palindrome (67922976).

The spelling of 15320625 in words is "fifteen million, three hundred twenty thousand, six hundred twenty-five".