400245401 has 4 divisors (see below), whose sum is σ = 400324404. Its totient is φ = 400166400.

The previous prime is 400245383. The next prime is 400245407. The reversal of 400245401 is 104542004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 152497801 + 247747600 = 12349^2 + 15740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400245401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400245407) 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, 31340 + ... + 42221.

It is an arithmetic number, because the mean of its divisors is an integer number (100081101).

Almost surely, 2^400245401 is an apocalyptic number.

It is an amenable number.

400245401 is a deficient number, since it is larger than the sum of its proper divisors (79003).

400245401 is an equidigital number, since it uses as much as digits as its factorization.

400245401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79002.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 400245401 is about 20006.1340843252. The cubic root of 400245401 is about 736.9569464272.

Adding to 400245401 its reverse (104542004), we get a palindrome (504787405).

The spelling of 400245401 in words is "four hundred million, two hundred forty-five thousand, four hundred one".