1210422138 has 16 divisors (see below), whose sum is σ = 2421219360. Its totient is φ = 403411536.

The previous prime is 1210422091. The next prime is 1210422167. The reversal of 1210422138 is 8312240121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43581 + ... + 65727.

It is an arithmetic number, because the mean of its divisors is an integer number (151326210).

Almost surely, 2^1210422138 is an apocalyptic number.

1210422138 is an abundant number, since it is smaller than the sum of its proper divisors (1210797222).

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

1210422138 is a wasteful number, since it uses less digits than its factorization.

1210422138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31261.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1210422138 is about 34791.1215398412. The cubic root of 1210422138 is about 1065.7261427985.

Adding to 1210422138 its reverse (8312240121), we get a palindrome (9522662259).

The spelling of 1210422138 in words is "one billion, two hundred ten million, four hundred twenty-two thousand, one hundred thirty-eight".