1213251396 has 24 divisors (see below), whose sum is σ = 3235337280. Its totient is φ = 346643232.

The previous prime is 1213251383. The next prime is 1213251419. The reversal of 1213251396 is 6931523121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7221651 + ... + 7221818.

It is an arithmetic number, because the mean of its divisors is an integer number (134805720).

Almost surely, 2^1213251396 is an apocalyptic number.

It is an amenable number.

1213251396 is an abundant number, since it is smaller than the sum of its proper divisors (2022085884).

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

1213251396 is a wasteful number, since it uses less digits than its factorization.

1213251396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14443483 (or 14443481 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 1213251396 is about 34831.7584396769. The cubic root of 1213251396 is about 1066.5558445194. Note that the first 3 decimals are identical.

The spelling of 1213251396 in words is "one billion, two hundred thirteen million, two hundred fifty-one thousand, three hundred ninety-six".