622591 has 8 divisors (see below), whose sum is σ = 672624. Its totient is φ = 574080.

The previous prime is 622577. The next prime is 622603. The reversal of 622591 is 195226.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622591 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556 + ... + 1246.

It is an arithmetic number, because the mean of its divisors is an integer number (84078).

2⁶²²⁵⁹¹ is an apocalyptic number.

622591 is a deficient number, since it is larger than the sum of its proper divisors (50033).

622591 is a wasteful number, since it uses less digits than its factorization.

622591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761.

The product of its digits is 1080, while the sum is 25.

The square root of 622591 is about 789.0443587023. The cubic root of 622591 is about 85.3888070422.

The spelling of 622591 in words is "six hundred twenty-two thousand, five hundred ninety-one".