15042542 has 4 divisors (see below), whose sum is σ = 22563816. Its totient is φ = 7521270.

The previous prime is 15042527. The next prime is 15042551. The reversal of 15042542 is 24524051.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24524051 = 113 ⋅217027.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3760634 + ... + 3760637.

It is an arithmetic number, because the mean of its divisors is an integer number (5640954).

Almost surely, 2^15042542 is an apocalyptic number.

15042542 is a deficient number, since it is larger than the sum of its proper divisors (7521274).

15042542 is an equidigital number, since it uses as much as digits as its factorization.

15042542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7521273.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 15042542 is about 3878.4716061872. The cubic root of 15042542 is about 246.8541375737.

Adding to 15042542 its reverse (24524051), we get a palindrome (39566593).

The spelling of 15042542 in words is "fifteen million, forty-two thousand, five hundred forty-two".