400610401 has 4 divisors (see below), whose sum is σ = 400667904. Its totient is φ = 400552900.

The previous prime is 400610387. The next prime is 400610407. The reversal of 400610401 is 104016004.

It is a happy number.

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 400610401 - 2⁵ = 400610369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400610407) 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, 16585 + ... + 32806.

It is an arithmetic number, because the mean of its divisors is an integer number (100166976).

Almost surely, 2^400610401 is an apocalyptic number.

It is an amenable number.

400610401 is a deficient number, since it is larger than the sum of its proper divisors (57503).

400610401 is an equidigital number, since it uses as much as digits as its factorization.

400610401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57502.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 400610401 is about 20015.2542077287. The cubic root of 400610401 is about 737.1808986648.

Adding to 400610401 its reverse (104016004), we get a palindrome (504626405).

The spelling of 400610401 in words is "four hundred million, six hundred ten thousand, four hundred one".