623525 has 18 divisors (see below), whose sum is σ = 901170. Its totient is φ = 426720.

The previous prime is 623521. The next prime is 623531. The reversal of 623525 is 525326.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 103684 + 519841 = 322^2 + 721^2 .

It is not a de Polignac number, because 623525 - 2² = 623521 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 2⁷ + 5 + 3⁹ + 2¹⁹ + 5⁷ .

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 623525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623521) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 971 + ... + 1479.

It is an arithmetic number, because the mean of its divisors is an integer number (50065).

2⁶²³⁵²⁵ is an apocalyptic number.

It is an amenable number.

623525 is a deficient number, since it is larger than the sum of its proper divisors (277645).

623525 is a wasteful number, since it uses less digits than its factorization.

623525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 521 counting only the distinct ones).

The product of its digits is 1800, while the sum is 23.

The square root of 623525 is about 789.6359920875. The cubic root of 623525 is about 85.4314853000.

The spelling of 623525 in words is "six hundred twenty-three thousand, five hundred twenty-five".