15245157 has 4 divisors (see below), whose sum is σ = 20326880. Its totient is φ = 10163436.

The previous prime is 15245137. The next prime is 15245161. The reversal of 15245157 is 75154251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75154251 = 3 ⋅25051417.

It is not a de Polignac number, because 15245157 - 2⁷ = 15245029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15245137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2540857 + ... + 2540862.

It is an arithmetic number, because the mean of its divisors is an integer number (5081720).

Almost surely, 2^15245157 is an apocalyptic number.

It is an amenable number.

15245157 is a deficient number, since it is larger than the sum of its proper divisors (5081723).

15245157 is an equidigital number, since it uses as much as digits as its factorization.

15245157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5081722.

The product of its digits is 7000, while the sum is 30.

The square root of 15245157 is about 3904.5047061055. The cubic root of 15245157 is about 247.9575293644.

The spelling of 15245157 in words is "fifteen million, two hundred forty-five thousand, one hundred fifty-seven".