1306432138 has 8 divisors (see below), whose sum is σ = 2137798080. Its totient is φ = 593832780.

The previous prime is 1306432111. The next prime is 1306432151. The reversal of 1306432138 is 8312346031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29691618 + ... + 29691661.

It is an arithmetic number, because the mean of its divisors is an integer number (267224760).

Almost surely, 2^1306432138 is an apocalyptic number.

1306432138 is a deficient number, since it is larger than the sum of its proper divisors (831365942).

1306432138 is a wasteful number, since it uses less digits than its factorization.

1306432138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59383292.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1306432138 is about 36144.6003989531. The cubic root of 1306432138 is about 1093.1899198624.

Adding to 1306432138 its reverse (8312346031), we get a palindrome (9618778169).

The spelling of 1306432138 in words is "one billion, three hundred six million, four hundred thirty-two thousand, one hundred thirty-eight".