130405138 has 4 divisors (see below), whose sum is σ = 195607710. Its totient is φ = 65202568.

The previous prime is 130405117. The next prime is 130405159. The reversal of 130405138 is 831504031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831504031 = 2351 ⋅353681.

It is an interprime number because it is at equal distance from previous prime (130405117) and next prime (130405159).

It can be written as a sum of positive squares in only one way, i.e., 92987449 + 37417689 = 9643^2 + 6117^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32601283 + ... + 32601286.

Almost surely, 2^130405138 is an apocalyptic number.

130405138 is a deficient number, since it is larger than the sum of its proper divisors (65202572).

130405138 is an equidigital number, since it uses as much as digits as its factorization.

130405138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65202571.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 130405138 is about 11419.5069070429. The cubic root of 130405138 is about 507.1053989734.

Adding to 130405138 its reverse (831504031), we get a palindrome (961909169).

The spelling of 130405138 in words is "one hundred thirty million, four hundred five thousand, one hundred thirty-eight".