1213396572 has 12 divisors (see below), whose sum is σ = 2831258696. Its totient is φ = 404465520.

The previous prime is 1213396553. The next prime is 1213396577. The reversal of 1213396572 is 2756933121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1213396572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213396577) 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, 50558179 + ... + 50558202.

Almost surely, 2^1213396572 is an apocalyptic number.

1213396572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213396572 is an abundant number, since it is smaller than the sum of its proper divisors (1617862124).

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

1213396572 is a wasteful number, since it uses less digits than its factorization.

1213396572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101116388 (or 101116386 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 1213396572 is about 34833.8423375889. The cubic root of 1213396572 is about 1066.5983836932.

The spelling of 1213396572 in words is "one billion, two hundred thirteen million, three hundred ninety-six thousand, five hundred seventy-two".