1518139234 has 4 divisors (see below), whose sum is σ = 2277208854. Its totient is φ = 759069616.

The previous prime is 1518139213. The next prime is 1518139279. The reversal of 1518139234 is 4329318151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4329318151 = 1291 ⋅3353461.

It can be written as a sum of positive squares in only one way, i.e., 984390625 + 533748609 = 31375^2 + 23103^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1518139193 and 1518139202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 379534807 + ... + 379534810.

Almost surely, 2^1518139234 is an apocalyptic number.

1518139234 is a deficient number, since it is larger than the sum of its proper divisors (759069620).

1518139234 is an equidigital number, since it uses as much as digits as its factorization.

1518139234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759069619.

The product of its digits is 25920, while the sum is 37.

The square root of 1518139234 is about 38963.3062508817. The cubic root of 1518139234 is about 1149.3100420879.

The spelling of 1518139234 in words is "one billion, five hundred eighteen million, one hundred thirty-nine thousand, two hundred thirty-four".