15156242 has 4 divisors (see below), whose sum is σ = 22734366. Its totient is φ = 7578120.

The previous prime is 15156233. The next prime is 15156247. The reversal of 15156242 is 24265151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24265151 = 3851 ⋅6301.

It can be written as a sum of positive squares in only one way, i.e., 14830201 + 326041 = 3851^2 + 571^2 .

It is not an unprimeable number, because it can be changed into a prime (15156247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3789059 + ... + 3789062.

Almost surely, 2^15156242 is an apocalyptic number.

15156242 is a deficient number, since it is larger than the sum of its proper divisors (7578124).

15156242 is an equidigital number, since it uses as much as digits as its factorization.

15156242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7578123.

The product of its digits is 2400, while the sum is 26.

The square root of 15156242 is about 3893.1018481411. The cubic root of 15156242 is about 247.4745312704.

The spelling of 15156242 in words is "fifteen million, one hundred fifty-six thousand, two hundred forty-two".