402459 has 4 divisors (see below), whose sum is σ = 536616. Its totient is φ = 268304.

The previous prime is 402443. The next prime is 402487. The reversal of 402459 is 954204.

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 402459 - 2⁴ = 402443 is a prime.

It is a D-number.

402459 is a lucky number.

It is a plaindrome in base 13.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67074 + ... + 67079.

It is an arithmetic number, because the mean of its divisors is an integer number (134154).

2⁴⁰²⁴⁵⁹ is an apocalyptic number.

402459 is a deficient number, since it is larger than the sum of its proper divisors (134157).

402459 is a wasteful number, since it uses less digits than its factorization.

402459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134156.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 402459 is about 634.3965636729. The cubic root of 402459 is about 73.8313055249.

It can be divided in two parts, 402 and 459, that added together give a triangular number (861 = T₄₁).

The spelling of 402459 in words is "four hundred two thousand, four hundred fifty-nine".