401281212 has 12 divisors (see below), whose sum is σ = 936322856. Its totient is φ = 133760400.

The previous prime is 401281201. The next prime is 401281217. The reversal of 401281212 is 212182104.

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

It is a super-2 number, since 2×401281212² = 322053222208377888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401281217) 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, 16720039 + ... + 16720062.

Almost surely, 2^401281212 is an apocalyptic number.

It is an amenable number.

401281212 is an abundant number, since it is smaller than the sum of its proper divisors (535041644).

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

401281212 is a wasteful number, since it uses less digits than its factorization.

401281212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33440108 (or 33440106 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 401281212 is about 20032.0046924915. The cubic root of 401281212 is about 737.5921322034.

The spelling of 401281212 in words is "four hundred one million, two hundred eighty-one thousand, two hundred twelve".