402654 has 16 divisors (see below), whose sum is σ = 920448. Its totient is φ = 115032.

The previous prime is 402631. The next prime is 402691. The reversal of 402654 is 456204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 402654.

It is a congruent number.

It is an unprimeable number.

402654 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4752 + ... + 4835.

It is an arithmetic number, because the mean of its divisors is an integer number (57528).

2⁴⁰²⁶⁵⁴ is an apocalyptic number.

402654 is an abundant number, since it is smaller than the sum of its proper divisors (517794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402654 is a wasteful number, since it uses less digits than its factorization.

402654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9599.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 402654 is about 634.5502344180. The cubic root of 402654 is about 73.8432278822.

Adding to 402654 its reverse (456204), we get a palindrome (858858).

The spelling of 402654 in words is "four hundred two thousand, six hundred fifty-four".