1516129742 has 4 divisors (see below), whose sum is σ = 2274194616. Its totient is φ = 758064870.

The previous prime is 1516129729. The next prime is 1516129781. The reversal of 1516129742 is 2479216151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2479216151 = 2437 ⋅1017323.

It is a junction number, because it is equal to n+sod(n) for n = 1516129696 and 1516129705.

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, 379032434 + ... + 379032437.

It is an arithmetic number, because the mean of its divisors is an integer number (568548654).

Almost surely, 2^1516129742 is an apocalyptic number.

1516129742 is a deficient number, since it is larger than the sum of its proper divisors (758064874).

1516129742 is an equidigital number, since it uses as much as digits as its factorization.

1516129742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758064873.

The product of its digits is 30240, while the sum is 38.

The square root of 1516129742 is about 38937.5107319407. The cubic root of 1516129742 is about 1148.8027216701.

The spelling of 1516129742 in words is "one billion, five hundred sixteen million, one hundred twenty-nine thousand, seven hundred forty-two".