1981252 has 24 divisors (see below), whose sum is σ = 4268096. Its totient is φ = 783648.

The previous prime is 1981247. The next prime is 1981267. The reversal of 1981252 is 2521891.

It is a super-3 number, since 3×1981252³ = 23331379006008825024, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1981252.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2358 + ... + 3085.

2^1981252 is an apocalyptic number.

It is an amenable number.

1981252 is an abundant number, since it is smaller than the sum of its proper divisors (2286844).

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

1981252 is a wasteful number, since it uses less digits than its factorization.

1981252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5467 (or 5465 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 1981252 is about 1407.5695364706. The cubic root of 1981252 is about 125.5971850830.

The spelling of 1981252 in words is "one million, nine hundred eighty-one thousand, two hundred fifty-two".