1263215560 has 32 divisors (see below), whose sum is σ = 2846972160. Its totient is φ = 504444096.

The previous prime is 1263215543. The next prime is 1263215561. The reversal of 1263215560 is 655123621.

It is a super-2 number, since 2×1263215560² = 3191427102052227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1263215561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1734 + ... + 50293.

It is an arithmetic number, because the mean of its divisors is an integer number (88967880).

Almost surely, 2^1263215560 is an apocalyptic number.

1263215560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263215560 is an abundant number, since it is smaller than the sum of its proper divisors (1583756600).

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

1263215560 is a wasteful number, since it uses less digits than its factorization.

1263215560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52645 (or 52641 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1263215560 is about 35541.7439076925. The cubic root of 1263215560 is about 1081.0003191959. Note that the first 3 decimals are identical.

The spelling of 1263215560 in words is "one billion, two hundred sixty-three million, two hundred fifteen thousand, five hundred sixty".