15042251 has 4 divisors (see below), whose sum is σ = 17191152. Its totient is φ = 12893352.

The previous prime is 15042197. The next prime is 15042257. The reversal of 15042251 is 15224051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15224051 = 379 ⋅40169.

It is a cyclic number.

It is not a de Polignac number, because 15042251 - 2⁶ = 15042187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15042257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074440 + ... + 1074453.

It is an arithmetic number, because the mean of its divisors is an integer number (4297788).

Almost surely, 2^15042251 is an apocalyptic number.

15042251 is a deficient number, since it is larger than the sum of its proper divisors (2148901).

15042251 is an equidigital number, since it uses as much as digits as its factorization.

15042251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148900.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 15042251 is about 3878.4340912281. The cubic root of 15042251 is about 246.8525457546.

The spelling of 15042251 in words is "fifteen million, forty-two thousand, two hundred fifty-one".