1516525042 has 4 divisors (see below), whose sum is σ = 2274787566. Its totient is φ = 758262520.

The previous prime is 1516525039. The next prime is 1516525051. The reversal of 1516525042 is 2405256151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1406925081 + 109599961 = 37509^2 + 10469^2 .

It is a super-3 number, since 3×1516525042³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1516524995 and 1516525013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 379131259 + ... + 379131262.

Almost surely, 2^1516525042 is an apocalyptic number.

1516525042 is a deficient number, since it is larger than the sum of its proper divisors (758262524).

1516525042 is an equidigital number, since it uses as much as digits as its factorization.

1516525042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758262523.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1516525042 is about 38942.5864831806. The cubic root of 1516525042 is about 1148.9025553104.

The spelling of 1516525042 in words is "one billion, five hundred sixteen million, five hundred twenty-five thousand, forty-two".