1261409368 has 16 divisors (see below), whose sum is σ = 2366230680. Its totient is φ = 630414528.

The previous prime is 1261409341. The next prime is 1261409419. The reversal of 1261409368 is 8639041621.

It is a self number, because there is not a number n which added to its sum of digits gives 1261409368.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17205 + ... + 53092.

Almost surely, 2^1261409368 is an apocalyptic number.

It is an amenable number.

1261409368 is a deficient number, since it is larger than the sum of its proper divisors (1104821312).

1261409368 is a wasteful number, since it uses less digits than its factorization.

1261409368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72546 (or 72542 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1261409368 is about 35516.3253729887. The cubic root of 1261409368 is about 1080.4848554559.

The spelling of 1261409368 in words is "one billion, two hundred sixty-one million, four hundred nine thousand, three hundred sixty-eight".