402499 has 4 divisors (see below), whose sum is σ = 408240. Its totient is φ = 396760.

The previous prime is 402487. The next prime is 402503. The reversal of 402499 is 994204.

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 402499 - 2⁷ = 402371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2764 + ... + 2905.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2⁴⁰²⁴⁹⁹ is an apocalyptic number.

402499 is a deficient number, since it is larger than the sum of its proper divisors (5741).

402499 is an equidigital number, since it uses as much as digits as its factorization.

402499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 402499 is about 634.4280889116. The cubic root of 402499 is about 73.8337514506.

The spelling of 402499 in words is "four hundred two thousand, four hundred ninety-nine".