402455 has 4 divisors (see below), whose sum is σ = 482952. Its totient is φ = 321960.

The previous prime is 402443. The next prime is 402487. The reversal of 402455 is 554204.

402455 = 101² + 102² + ... + 130².

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-402455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40241 + ... + 40250.

It is an arithmetic number, because the mean of its divisors is an integer number (120738).

2⁴⁰²⁴⁵⁵ is an apocalyptic number.

402455 is a deficient number, since it is larger than the sum of its proper divisors (80497).

402455 is an equidigital number, since it uses as much as digits as its factorization.

402455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80496.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 402455 is about 634.3934110629. The cubic root of 402455 is about 73.8310609234.

Adding to 402455 its reverse (554204), we get a palindrome (956659).

The spelling of 402455 in words is "four hundred two thousand, four hundred fifty-five".