401280252 has 12 divisors (see below), whose sum is σ = 936320616. Its totient is φ = 133760080.

The previous prime is 401280251. The next prime is 401280259. The reversal of 401280252 is 252082104.

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

It is a super-2 number, since 2×401280252² = 322051681290367008, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401280251) 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, 16719999 + ... + 16720022.

It is an arithmetic number, because the mean of its divisors is an integer number (78026718).

Almost surely, 2^401280252 is an apocalyptic number.

It is an amenable number.

401280252 is an abundant number, since it is smaller than the sum of its proper divisors (535040364).

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

401280252 is a wasteful number, since it uses less digits than its factorization.

401280252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33440028 (or 33440026 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 401280252 is about 20031.9807308214. The cubic root of 401280252 is about 737.5915440132.

The spelling of 401280252 in words is "four hundred one million, two hundred eighty thousand, two hundred fifty-two".