1216625954 has 16 divisors (see below), whose sum is σ = 1843241400. Its totient is φ = 602221824.

The previous prime is 1216625941. The next prime is 1216625981. The reversal of 1216625954 is 4595266121.

It can be written as a sum of positive squares in 4 ways, for example, as 1167247225 + 49378729 = 34165^2 + 7027^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502154 + ... + 504570.

Almost surely, 2^1216625954 is an apocalyptic number.

1216625954 is a deficient number, since it is larger than the sum of its proper divisors (626615446).

1216625954 is a wasteful number, since it uses less digits than its factorization.

1216625954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4837.

The product of its digits is 129600, while the sum is 41.

The square root of 1216625954 is about 34880.1656246068. The cubic root of 1216625954 is about 1067.5437746384.

The spelling of 1216625954 in words is "one billion, two hundred sixteen million, six hundred twenty-five thousand, nine hundred fifty-four".