402497 has 4 divisors (see below), whose sum is σ = 412356. Its totient is φ = 392640.

The previous prime is 402487. The next prime is 402503. The reversal of 402497 is 794204.

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 229441 + 173056 = 479^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 402497 - 2¹⁰ = 401473 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402497.

It is not an unprimeable number, because it can be changed into a prime (402487) 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, 4868 + ... + 4949.

It is an arithmetic number, because the mean of its divisors is an integer number (103089).

2⁴⁰²⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

402497 is a deficient number, since it is larger than the sum of its proper divisors (9859).

402497 is an equidigital number, since it uses as much as digits as its factorization.

402497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9858.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 402497 is about 634.4265126869. The cubic root of 402497 is about 73.8336291581.

The spelling of 402497 in words is "four hundred two thousand, four hundred ninety-seven".