402635 has 4 divisors (see below), whose sum is σ = 483168. Its totient is φ = 322104.

The previous prime is 402631. The next prime is 402691. The reversal of 402635 is 536204.

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

It is a cyclic number.

It is not a de Polignac number, because 402635 - 2² = 402631 is a prime.

It is a super-2 number, since 2×402635² = 324229886450, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (402631) 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, 40259 + ... + 40268.

It is an arithmetic number, because the mean of its divisors is an integer number (120792).

2⁴⁰²⁶³⁵ is an apocalyptic number.

402635 is a deficient number, since it is larger than the sum of its proper divisors (80533).

402635 is an equidigital number, since it uses as much as digits as its factorization.

402635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80532.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 402635 is about 634.5352630075. The cubic root of 402635 is about 73.8420663859.

Adding to 402635 its reverse (536204), we get a palindrome (938839).

The spelling of 402635 in words is "four hundred two thousand, six hundred thirty-five".