13142138 has 4 divisors (see below), whose sum is σ = 19713210. Its totient is φ = 6571068.

The previous prime is 13142123. The next prime is 13142147. The reversal of 13142138 is 83124131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83124131 = 89 ⋅933979.

It can be written as a sum of positive squares in only one way, i.e., 7006609 + 6135529 = 2647^2 + 2477^2 .

It is a super-2 number, since 2×13142138² = 345431582422088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3285533 + ... + 3285536.

Almost surely, 2^13142138 is an apocalyptic number.

13142138 is a deficient number, since it is larger than the sum of its proper divisors (6571072).

13142138 is an equidigital number, since it uses as much as digits as its factorization.

13142138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6571071.

The product of its digits is 576, while the sum is 23.

The square root of 13142138 is about 3625.2086836484. The cubic root of 13142138 is about 235.9873233639.

Adding to 13142138 its reverse (83124131), we get a palindrome (96266269).

The spelling of 13142138 in words is "thirteen million, one hundred forty-two thousand, one hundred thirty-eight".