1261063628 has 24 divisors (see below), whose sum is σ = 2425069584. Its totient is φ = 569024000.

The previous prime is 1261063607. The next prime is 1261063631. The reversal of 1261063628 is 8263601621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98573 + ... + 110628.

It is an arithmetic number, because the mean of its divisors is an integer number (101044566).

Almost surely, 2^1261063628 is an apocalyptic number.

It is an amenable number.

1261063628 is a deficient number, since it is larger than the sum of its proper divisors (1164005956).

1261063628 is a wasteful number, since it uses less digits than its factorization.

1261063628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209353 (or 209351 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1261063628 is about 35511.4577002972. The cubic root of 1261063628 is about 1080.3861296499.

The spelling of 1261063628 in words is "one billion, two hundred sixty-one million, sixty-three thousand, six hundred twenty-eight".