402407 has 4 divisors (see below), whose sum is σ = 426096. Its totient is φ = 378720.

The previous prime is 402403. The next prime is 402419. The reversal of 402407 is 704204.

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 402407 - 2² = 402403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 23671 = 402407 / (4 + 0 + 2 + 4 + 0 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11819 + ... + 11852.

It is an arithmetic number, because the mean of its divisors is an integer number (106524).

2⁴⁰²⁴⁰⁷ is an apocalyptic number.

402407 is a deficient number, since it is larger than the sum of its proper divisors (23689).

402407 is a wasteful number, since it uses less digits than its factorization.

402407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23688.

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 402407 is about 634.3555785204. The cubic root of 402407 is about 73.8281255793.

The spelling of 402407 in words is "four hundred two thousand, four hundred seven", and thus it is an iban number.