623545 has 16 divisors (see below), whose sum is σ = 825552. Its totient is φ = 449280.

The previous prime is 623537. The next prime is 623563. The reversal of 623545 is 545326.

623545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 139129 + 484416 = 373^2 + 696^2 .

It is not a de Polignac number, because 623545 - 2³ = 623537 is a prime.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3355 + ... + 3535.

It is an arithmetic number, because the mean of its divisors is an integer number (51597).

2⁶²³⁵⁴⁵ is an apocalyptic number.

623545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

623545 is a deficient number, since it is larger than the sum of its proper divisors (202007).

623545 is a wasteful number, since it uses less digits than its factorization.

623545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252.

The product of its digits is 3600, while the sum is 25.

The square root of 623545 is about 789.6486560490. The cubic root of 623545 is about 85.4323987151.

The spelling of 623545 in words is "six hundred twenty-three thousand, five hundred forty-five".