15021242042 has 4 divisors (see below), whose sum is σ = 22531863066. Its totient is φ = 7510621020.

The previous prime is 15021242023. The next prime is 15021242059. The reversal of 15021242042 is 24024212051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24024212051 = 7 ⋅3432030293.

It can be written as a sum of positive squares in only one way, i.e., 8315433721 + 6705808321 = 91189^2 + 81889^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15021241999 and 15021242017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3755310509 + ... + 3755310512.

Almost surely, 2^15021242042 is an apocalyptic number.

15021242042 is a deficient number, since it is larger than the sum of its proper divisors (7510621024).

15021242042 is an equidigital number, since it uses as much as digits as its factorization.

15021242042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7510621023.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 15021242042 its reverse (24024212051), we get a palindrome (39045454093).

The spelling of 15021242042 in words is "fifteen billion, twenty-one million, two hundred forty-two thousand, forty-two".