1261404632 has 16 divisors (see below), whose sum is σ = 2441428800. Its totient is φ = 610356960.

The previous prime is 1261404583. The next prime is 1261404637. The reversal of 1261404632 is 2364041621.

It is a super-2 number, since 2×1261404632² = 3182283291262110848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1261404595 and 1261404604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261404637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2542907 + ... + 2543402.

It is an arithmetic number, because the mean of its divisors is an integer number (152589300).

Almost surely, 2^1261404632 is an apocalyptic number.

It is an amenable number.

1261404632 is a deficient number, since it is larger than the sum of its proper divisors (1180024168).

1261404632 is a wasteful number, since it uses less digits than its factorization.

1261404632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086346 (or 5086342 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1261404632 is about 35516.2586993619. The cubic root of 1261404632 is about 1080.4835032164.

The spelling of 1261404632 in words is "one billion, two hundred sixty-one million, four hundred four thousand, six hundred thirty-two".