1516811042 has 4 divisors (see below), whose sum is σ = 2275216566. Its totient is φ = 758405520.

The previous prime is 1516811017. The next prime is 1516811083. The reversal of 1516811042 is 2401186151.

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., 1013212561 + 503598481 = 31831^2 + 22441^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1516810996 and 1516811014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 379202759 + ... + 379202762.

Almost surely, 2^1516811042 is an apocalyptic number.

1516811042 is a deficient number, since it is larger than the sum of its proper divisors (758405524).

1516811042 is an equidigital number, since it uses as much as digits as its factorization.

1516811042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758405523.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1516811042 is about 38946.2583825456. The cubic root of 1516811042 is about 1148.9747742469.

Adding to 1516811042 its reverse (2401186151), we get a palindrome (3917997193).

The spelling of 1516811042 in words is "one billion, five hundred sixteen million, eight hundred eleven thousand, forty-two".