1261054632 has 16 divisors (see below), whose sum is σ = 3152636640. Its totient is φ = 420351536.

The previous prime is 1261054631. The next prime is 1261054657. The reversal of 1261054632 is 2364501621.

It is a self number, because there is not a number n which added to its sum of digits gives 1261054632.

It is not an unprimeable number, because it can be changed into a prime (1261054631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26271948 + ... + 26271995.

It is an arithmetic number, because the mean of its divisors is an integer number (197039790).

Almost surely, 2^1261054632 is an apocalyptic number.

1261054632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1261054632 is an abundant number, since it is smaller than the sum of its proper divisors (1891582008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261054632 is a wasteful number, since it uses less digits than its factorization.

1261054632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52543952 (or 52543948 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1261054632 is about 35511.3310367269. The cubic root of 1261054632 is about 1080.3835606078.

The spelling of 1261054632 in words is "one billion, two hundred sixty-one million, fifty-four thousand, six hundred thirty-two".