400253901 has 8 divisors (see below), whose sum is σ = 548095584. Its totient is φ = 259624080.

The previous prime is 400253881. The next prime is 400253921. The reversal of 400253901 is 109352004.

It is an interprime number because it is at equal distance from previous prime (400253881) and next prime (400253921).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400253901 - 2¹³ = 400245709 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400253921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1802835 + ... + 1803056.

It is an arithmetic number, because the mean of its divisors is an integer number (68511948).

Almost surely, 2^400253901 is an apocalyptic number.

It is an amenable number.

400253901 is a deficient number, since it is larger than the sum of its proper divisors (147841683).

400253901 is a wasteful number, since it uses less digits than its factorization.

400253901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3605931.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 400253901 is about 20006.3465180427. The cubic root of 400253901 is about 736.9621633014.

The spelling of 400253901 in words is "four hundred million, two hundred fifty-three thousand, nine hundred one".