1912520961 has 24 divisors (see below), whose sum is σ = 3150037800. Its totient is φ = 1107703296.

The previous prime is 1912520923. The next prime is 1912520969. The reversal of 1912520961 is 1690252191.

It can be written as a sum of positive squares in 4 ways, for example, as 419471361 + 1493049600 = 20481^2 + 38640^2 .

It is not a de Polignac number, because 1912520961 - 2¹¹ = 1912518913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1912520969) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 478786 + ... + 482763.

It is an arithmetic number, because the mean of its divisors is an integer number (131251575).

Almost surely, 2^1912520961 is an apocalyptic number.

It is an amenable number.

1912520961 is a deficient number, since it is larger than the sum of its proper divisors (1237516839).

1912520961 is a wasteful number, since it uses less digits than its factorization.

1912520961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961585 (or 961582 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 1912520961 is about 43732.3788628060. The cubic root of 1912520961 is about 1241.2770750720.

The spelling of 1912520961 in words is "one billion, nine hundred twelve million, five hundred twenty thousand, nine hundred sixty-one".