400402601 has 4 divisors (see below), whose sum is σ = 401707152. Its totient is φ = 399098052.

The previous prime is 400402579. The next prime is 400402619. The reversal of 400402601 is 106204004.

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 400402601 - 2¹⁰ = 400401577 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 400402601.

It is not an unprimeable number, because it can be changed into a prime (400402621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651815 + ... + 652428.

It is an arithmetic number, because the mean of its divisors is an integer number (100426788).

Almost surely, 2^400402601 is an apocalyptic number.

It is an amenable number.

400402601 is a deficient number, since it is larger than the sum of its proper divisors (1304551).

400402601 is a wasteful number, since it uses less digits than its factorization.

400402601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304550.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400402601 is about 20010.0624936555. The cubic root of 400402601 is about 737.0534159665.

Adding to 400402601 its reverse (106204004), we get a palindrome (506606605).

The spelling of 400402601 in words is "four hundred million, four hundred two thousand, six hundred one".