1213919452 has 24 divisors (see below), whose sum is σ = 2194803072. Its totient is φ = 586867200.

The previous prime is 1213919449. The next prime is 1213919453. The reversal of 1213919452 is 2549193121.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213919453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165168 + ... + 172360.

It is an arithmetic number, because the mean of its divisors is an integer number (91450128).

Almost surely, 2^1213919452 is an apocalyptic number.

It is an amenable number.

1213919452 is a deficient number, since it is larger than the sum of its proper divisors (980883620).

1213919452 is a wasteful number, since it uses less digits than its factorization.

1213919452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8589 (or 8587 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 1213919452 is about 34841.3468740805. The cubic root of 1213919452 is about 1066.7515688062.

The spelling of 1213919452 in words is "one billion, two hundred thirteen million, nine hundred nineteen thousand, four hundred fifty-two".