15240645 has 24 divisors (see below), whose sum is σ = 30191616. Its totient is φ = 6967008.

The previous prime is 15240629. The next prime is 15240713. The reversal of 15240645 is 54604251.

15240645 is a `hidden beast` number, since 15 + 2 + 4 + 0 + 645 = 666.

15240645 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 15240645 - 2⁴ = 15240629 is a prime.

It is a congruent number.

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, 23877 + ... + 24506.

It is an arithmetic number, because the mean of its divisors is an integer number (1257984).

Almost surely, 2^15240645 is an apocalyptic number.

15240645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15240645 is a deficient number, since it is larger than the sum of its proper divisors (14950971).

15240645 is a wasteful number, since it uses less digits than its factorization.

15240645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48401 (or 48398 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 15240645 is about 3903.9268691921. The cubic root of 15240645 is about 247.9330648790.

Adding to 15240645 its reverse (54604251), we get a palindrome (69844896).

The spelling of 15240645 in words is "fifteen million, two hundred forty thousand, six hundred forty-five".