1252666220 has 24 divisors (see below), whose sum is σ = 2832953424. Its totient is φ = 462522816.

The previous prime is 1252666187. The next prime is 1252666241. The reversal of 1252666220 is 226662521.

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, 2408714 + ... + 2409233.

It is an arithmetic number, because the mean of its divisors is an integer number (118039726).

Almost surely, 2^1252666220 is an apocalyptic number.

1252666220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252666220 is an abundant number, since it is smaller than the sum of its proper divisors (1580287204).

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

1252666220 is a wasteful number, since it uses less digits than its factorization.

1252666220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4817969 (or 4817967 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1252666220 is about 35393.0250190627. The cubic root of 1252666220 is about 1077.9826940311.

The spelling of 1252666220 in words is "one billion, two hundred fifty-two million, six hundred sixty-six thousand, two hundred twenty".