623541 has 4 divisors (see below), whose sum is σ = 831392. Its totient is φ = 415692.

The previous prime is 623537. The next prime is 623563. The reversal of 623541 is 145326.

It is a happy number.

623541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 623541 - 2² = 623537 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

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 3 ways as a sum of consecutive naturals, for example, 103921 + ... + 103926.

It is an arithmetic number, because the mean of its divisors is an integer number (207848).

2⁶²³⁵⁴¹ is an apocalyptic number.

It is an amenable number.

623541 is a deficient number, since it is larger than the sum of its proper divisors (207851).

623541 is a wasteful number, since it uses less digits than its factorization.

623541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207850.

The product of its digits is 720, while the sum is 21.

The square root of 623541 is about 789.6461232730. The cubic root of 623541 is about 85.4322160336.

Adding to 623541 its reverse (145326), we get a palindrome (768867).

It can be divided in two parts, 6 and 23541, that multiplied together give a triangular number (141246 = T₅₃₁).

The spelling of 623541 in words is "six hundred twenty-three thousand, five hundred forty-one".