1012431138 has 8 divisors (see below), whose sum is σ = 2024862288. Its totient is φ = 337477044.

The previous prime is 1012431137. The next prime is 1012431157. The reversal of 1012431138 is 8311342101.

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

1012431138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1012431137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84369256 + ... + 84369267.

It is an arithmetic number, because the mean of its divisors is an integer number (253107786).

Almost surely, 2^1012431138 is an apocalyptic number.

1012431138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1012431138 is a wasteful number, since it uses less digits than its factorization.

1012431138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168738528.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1012431138 is about 31818.7230730587. The cubic root of 1012431138 is about 1004.1266599198.

Adding to 1012431138 its reverse (8311342101), we get a palindrome (9323773239).

The spelling of 1012431138 in words is "one billion, twelve million, four hundred thirty-one thousand, one hundred thirty-eight".