1261596604 has 6 divisors (see below), whose sum is σ = 2207794064. Its totient is φ = 630798300.

The previous prime is 1261596601. The next prime is 1261596649. The reversal of 1261596604 is 4066951621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261596601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157699572 + ... + 157699579.

Almost surely, 2^1261596604 is an apocalyptic number.

It is an amenable number.

1261596604 is a deficient number, since it is larger than the sum of its proper divisors (946197460).

1261596604 is a wasteful number, since it uses less digits than its factorization.

1261596604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315399155 (or 315399153 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 1261596604 is about 35518.9611897645. The cubic root of 1261596604 is about 1080.5383130298.

The spelling of 1261596604 in words is "one billion, two hundred sixty-one million, five hundred ninety-six thousand, six hundred four".