400172401 has 8 divisors (see below), whose sum is σ = 429681024. Its totient is φ = 371327040.

The previous prime is 400172389. The next prime is 400172413. The reversal of 400172401 is 104271004.

It is an interprime number because it is at equal distance from previous prime (400172389) and next prime (400172413).

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

It is a cyclic number.

It is not a de Polignac number, because 400172401 - 2⁵ = 400172369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400172431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164565 + ... + 166978.

It is an arithmetic number, because the mean of its divisors is an integer number (53710128).

Almost surely, 2^400172401 is an apocalyptic number.

It is an amenable number.

400172401 is a deficient number, since it is larger than the sum of its proper divisors (29508623).

400172401 is a wasteful number, since it uses less digits than its factorization.

400172401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331631.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 400172401 is about 20004.3095606922. The cubic root of 400172401 is about 736.9121396428.

The spelling of 400172401 in words is "four hundred million, one hundred seventy-two thousand, four hundred one".