15240985 has 4 divisors (see below), whose sum is σ = 18289188. Its totient is φ = 12192784.

The previous prime is 15240977. The next prime is 15240997. The reversal of 15240985 is 58904251.

15240985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7557001 + 7683984 = 2749^2 + 2772^2 .

It is a cyclic number.

It is not a de Polignac number, because 15240985 - 2³ = 15240977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15240985.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1524094 + ... + 1524103.

It is an arithmetic number, because the mean of its divisors is an integer number (4572297).

Almost surely, 2^15240985 is an apocalyptic number.

It is an amenable number.

15240985 is a deficient number, since it is larger than the sum of its proper divisors (3048203).

15240985 is an equidigital number, since it uses as much as digits as its factorization.

15240985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048202.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 15240985 is about 3903.9704148469. The cubic root of 15240985 is about 247.9349085589.

The spelling of 15240985 in words is "fifteen million, two hundred forty thousand, nine hundred eighty-five".