1252824420 has 24 divisors (see below), whose sum is σ = 3507908544. Its totient is φ = 334086496.

The previous prime is 1252824409. The next prime is 1252824427. The reversal of 1252824420 is 244282521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1252824427) 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, 10440144 + ... + 10440263.

It is an arithmetic number, because the mean of its divisors is an integer number (146162856).

Almost surely, 2^1252824420 is an apocalyptic number.

1252824420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252824420 is an abundant number, since it is smaller than the sum of its proper divisors (2255084124).

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

1252824420 is a wasteful number, since it uses less digits than its factorization.

1252824420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20880419 (or 20880417 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

The square root of 1252824420 is about 35395.2598521327. The cubic root of 1252824420 is about 1078.0280718237.

The spelling of 1252824420 in words is "one billion, two hundred fifty-two million, eight hundred twenty-four thousand, four hundred twenty".