1216753924 has 27 divisors (see below), whose sum is σ = 2162672967. Its totient is φ = 598993704.

The previous prime is 1216753919. The next prime is 1216753927. The reversal of 1216753924 is 4293576121.

It is a happy number.

The square root of 1216753924 is 34882.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×1216753924² = 2960980223138795552, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216753927) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7464667 + ... + 7464829.

Almost surely, 2^1216753924 is an apocalyptic number.

1216753924 is the 34882-nd square number.

It is an amenable number.

1216753924 is a deficient number, since it is larger than the sum of its proper divisors (945919043).

1216753924 is an equidigital number, since it uses as much as digits as its factorization.

1216753924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 272 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The cubic root of 1216753924 is about 1067.5812029558.

The spelling of 1216753924 in words is "one billion, two hundred sixteen million, seven hundred fifty-three thousand, nine hundred twenty-four".