402605 has 8 divisors (see below), whose sum is σ = 552192. Its totient is φ = 276048.

The previous prime is 402601. The next prime is 402613. The reversal of 402605 is 506204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402605 - 2² = 402601 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5717 + ... + 5786.

It is an arithmetic number, because the mean of its divisors is an integer number (69024).

2⁴⁰²⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

402605 is a deficient number, since it is larger than the sum of its proper divisors (149587).

402605 is a wasteful number, since it uses less digits than its factorization.

402605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11515.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 402605 is about 634.5116232190. The cubic root of 402605 is about 73.8402323700.

Adding to 402605 its reverse (506204), we get a palindrome (908809).

The spelling of 402605 in words is "four hundred two thousand, six hundred five".