1012556265 has 48 divisors (see below), whose sum is σ = 1954182528. Its totient is φ = 438504192.

The previous prime is 1012556249. The next prime is 1012556273. The reversal of 1012556265 is 5626552101.

It is not a de Polignac number, because 1012556265 - 2⁴ = 1012556249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24549 + ... + 51261.

It is an arithmetic number, because the mean of its divisors is an integer number (40712136).

Almost surely, 2^1012556265 is an apocalyptic number.

1012556265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1012556265 is a deficient number, since it is larger than the sum of its proper divisors (941626263).

1012556265 is a wasteful number, since it uses less digits than its factorization.

1012556265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26766 (or 26747 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 1012556265 is about 31820.6892602910. The cubic root of 1012556265 is about 1004.1680250972.

The spelling of 1012556265 in words is "one billion, twelve million, five hundred fifty-six thousand, two hundred sixty-five".