1581252 has 12 divisors (see below), whose sum is σ = 3689616. Its totient is φ = 527080.

The previous prime is 1581211. The next prime is 1581257. The reversal of 1581252 is 2521851.

It is a tau number, because it is divible by the number of its divisors (12).

It is a zygodrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1581257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65874 + ... + 65897.

It is an arithmetic number, because the mean of its divisors is an integer number (307468).

2^1581252 is an apocalyptic number.

1581252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1581252 is an abundant number, since it is smaller than the sum of its proper divisors (2108364).

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

1581252 is a wasteful number, since it uses less digits than its factorization.

1581252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131778 (or 131776 counting only the distinct ones).

The product of its digits is 800, while the sum is 24.

The square root of 1581252 is about 1257.4784292385. The cubic root of 1581252 is about 116.5020844857.

The spelling of 1581252 in words is "one million, five hundred eighty-one thousand, two hundred fifty-two".