402523 has 16 divisors (see below), whose sum is σ = 481536. Its totient is φ = 332640.

The previous prime is 402517. The next prime is 402527. The reversal of 402523 is 325204.

It is not a de Polignac number, because 402523 - 2¹⁷ = 271451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402497 and 402506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9340 + ... + 9382.

It is an arithmetic number, because the mean of its divisors is an integer number (30096).

2⁴⁰²⁵²³ is an apocalyptic number.

402523 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

402523 is a deficient number, since it is larger than the sum of its proper divisors (79013).

402523 is a wasteful number, since it uses less digits than its factorization.

402523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 402523 is about 634.4470033029. The cubic root of 402523 is about 73.8352189282.

Adding to 402523 its reverse (325204), we get a palindrome (727727).

The spelling of 402523 in words is "four hundred two thousand, five hundred twenty-three".