1252442220 has 48 divisors (see below), whose sum is σ = 3522190560. Its totient is φ = 332522496.

The previous prime is 1252442203. The next prime is 1252442237. The reversal of 1252442220 is 222442521.

It is an interprime number because it is at equal distance from previous prime (1252442203) and next prime (1252442237).

It is a super-2 number, since 2×1252442220² = 3137223028877056800, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 31837 + ... + 59316.

It is an arithmetic number, because the mean of its divisors is an integer number (73378970).

Almost surely, 2^1252442220 is an apocalyptic number.

1252442220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252442220 is an abundant number, since it is smaller than the sum of its proper divisors (2269748340).

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

1252442220 is a wasteful number, since it uses less digits than its factorization.

1252442220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91394 (or 91392 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1252442220 is about 35389.8604122706. The cubic root of 1252442220 is about 1077.9184357544.

Adding to 1252442220 its reverse (222442521), we get a palindrome (1474884741).

The spelling of 1252442220 in words is "one billion, two hundred fifty-two million, four hundred forty-two thousand, two hundred twenty".