400158001 has 4 divisors (see below), whose sum is σ = 406940400. Its totient is φ = 393375604.

The previous prime is 400157983. The next prime is 400158007. The reversal of 400158001 is 100851004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400158001 - 2⁷ = 400157873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400158001.

It is not an unprimeable number, because it can be changed into a prime (400158007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3391111 + ... + 3391228.

It is an arithmetic number, because the mean of its divisors is an integer number (101735100).

Almost surely, 2^400158001 is an apocalyptic number.

It is an amenable number.

400158001 is a deficient number, since it is larger than the sum of its proper divisors (6782399).

400158001 is an equidigital number, since it uses as much as digits as its factorization.

400158001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6782398.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 400158001 is about 20003.9496350096. The cubic root of 400158001 is about 736.9033004008.

The spelling of 400158001 in words is "four hundred million, one hundred fifty-eight thousand, one".