401402252 has 24 divisors (see below), whose sum is σ = 718383120. Its totient is φ = 196188480.

The previous prime is 401402251. The next prime is 401402273. The reversal of 401402252 is 252204104.

It is a happy number.

It is a super-2 number, since 2×401402252² = 322247535821343008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401402251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38018 + ... + 47414.

It is an arithmetic number, because the mean of its divisors is an integer number (29932630).

Almost surely, 2^401402252 is an apocalyptic number.

It is an amenable number.

401402252 is a deficient number, since it is larger than the sum of its proper divisors (316980868).

401402252 is a wasteful number, since it uses less digits than its factorization.

401402252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9641 (or 9639 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 401402252 is about 20035.0256301308. The cubic root of 401402252 is about 737.6662856682. Note that the first 3 decimals are identical.

Adding to 401402252 its reverse (252204104), we get a palindrome (653606356).

The spelling of 401402252 in words is "four hundred one million, four hundred two thousand, two hundred fifty-two".