401213252 has 18 divisors (see below), whose sum is σ = 771756174. Its totient is φ = 182369440.

The previous prime is 401213221. The next prime is 401213279. The reversal of 401213252 is 252312104.

It can be written as a sum of positive squares in only one way, i.e., 399040576 + 2172676 = 19976^2 + 1474^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 413993 + ... + 414960.

It is an arithmetic number, because the mean of its divisors is an integer number (42875343).

Almost surely, 2^401213252 is an apocalyptic number.

It is an amenable number.

401213252 is a deficient number, since it is larger than the sum of its proper divisors (370542922).

401213252 is a wasteful number, since it uses less digits than its factorization.

401213252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828979 (or 828966 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 401213252 is about 20030.3083351206. The cubic root of 401213252 is about 737.5504909222.

Adding to 401213252 its reverse (252312104), we get a palindrome (653525356).

The spelling of 401213252 in words is "four hundred one million, two hundred thirteen thousand, two hundred fifty-two".