15243057 has 12 divisors (see below), whose sum is σ = 22320324. Its totient is φ = 10022400.

The previous prime is 15243049. The next prime is 15243071. The reversal of 15243057 is 75034251.

It is a happy number.

15243057 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 can be written as a sum of positive squares in 2 ways, for example, as 11861136 + 3381921 = 3444^2 + 1839^2 .

It is not a de Polignac number, because 15243057 - 2³ = 15243049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15243057.

It is not an unprimeable number, because it can be changed into a prime (15243097) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10944 + ... + 12257.

It is an arithmetic number, because the mean of its divisors is an integer number (1860027).

Almost surely, 2^15243057 is an apocalyptic number.

It is an amenable number.

15243057 is a deficient number, since it is larger than the sum of its proper divisors (7077267).

15243057 is a wasteful number, since it uses less digits than its factorization.

15243057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23280 (or 23277 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 15243057 is about 3904.2357766918. The cubic root of 15243057 is about 247.9461435688.

The spelling of 15243057 in words is "fifteen million, two hundred forty-three thousand, fifty-seven".