401221158 has 32 divisors (see below), whose sum is σ = 892050432. Its totient is φ = 119469600.

The previous prime is 401221151. The next prime is 401221159. The reversal of 401221158 is 851122104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401221151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80548 + ... + 85383.

It is an arithmetic number, because the mean of its divisors is an integer number (27876576).

Almost surely, 2^401221158 is an apocalyptic number.

401221158 is an abundant number, since it is smaller than the sum of its proper divisors (490829274).

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

401221158 is a wasteful number, since it uses less digits than its factorization.

401221158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165980.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 401221158 is about 20030.5056850794. The cubic root of 401221158 is about 737.5553354248. Note that the first 3 decimals are identical.

The spelling of 401221158 in words is "four hundred one million, two hundred twenty-one thousand, one hundred fifty-eight".