1209994972 has 24 divisors (see below), whose sum is σ = 2149268576. Its totient is φ = 595980288.

The previous prime is 1209994967. The next prime is 1209994991. The reversal of 1209994972 is 2794999021.

It is a congruent number.

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, 71908 + ... + 87124.

Almost surely, 2^1209994972 is an apocalyptic number.

It is an amenable number.

1209994972 is a deficient number, since it is larger than the sum of its proper divisors (939273604).

1209994972 is a wasteful number, since it uses less digits than its factorization.

1209994972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15517 (or 15515 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 1209994972 is about 34784.9819893586. The cubic root of 1209994972 is about 1065.6007607734.

The spelling of 1209994972 in words is "one billion, two hundred nine million, nine hundred ninety-four thousand, nine hundred seventy-two".