622651 has 4 divisors (see below), whose sum is σ = 625600. Its totient is φ = 619704.

The previous prime is 622639. The next prime is 622663. The reversal of 622651 is 156226.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (622639) and next prime (622663).

It is a cyclic number.

It is not a de Polignac number, because 622651 - 2⁵ = 622619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622621) 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, 1131 + ... + 1588.

It is an arithmetic number, because the mean of its divisors is an integer number (156400).

2⁶²²⁶⁵¹ is an apocalyptic number.

622651 is a deficient number, since it is larger than the sum of its proper divisors (2949).

622651 is a wasteful number, since it uses less digits than its factorization.

622651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948.

The product of its digits is 720, while the sum is 22.

The square root of 622651 is about 789.0823784625. The cubic root of 622651 is about 85.3915499686.

Adding to 622651 its reverse (156226), we get a palindrome (778877).

The spelling of 622651 in words is "six hundred twenty-two thousand, six hundred fifty-one".