402312401 has 4 divisors (see below), whose sum is σ = 402534912. Its totient is φ = 402089892.

The previous prime is 402312353. The next prime is 402312437. The reversal of 402312401 is 104213204.

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 a de Polignac number, because none of the positive numbers 2^k-402312401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 402312401.

It is not an unprimeable number, because it can be changed into a prime (402312461) 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, 108521 + ... + 112166.

It is an arithmetic number, because the mean of its divisors is an integer number (100633728).

Almost surely, 2^402312401 is an apocalyptic number.

It is an amenable number.

402312401 is a deficient number, since it is larger than the sum of its proper divisors (222511).

402312401 is a wasteful number, since it uses less digits than its factorization.

402312401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222510.

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

The square root of 402312401 is about 20057.7267156575. The cubic root of 402312401 is about 738.2233988285.

Adding to 402312401 its reverse (104213204), we get a palindrome (506525605).

The spelling of 402312401 in words is "four hundred two million, three hundred twelve thousand, four hundred one".