621023 has 16 divisors (see below), whose sum is σ = 731136. Its totient is φ = 522720.

The previous prime is 621017. The next prime is 621029. The reversal of 621023 is 320126.

It is an interprime number because it is at equal distance from previous prime (621017) and next prime (621029).

It is a cyclic number.

It is not a de Polignac number, because 621023 - 2⁴ = 621007 is a prime.

It is a Duffinian number.

621023 is a modest number, since divided by 1023 gives 62 as remainder.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 620989 and 621007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9236 + ... + 9302.

It is an arithmetic number, because the mean of its divisors is an integer number (45696).

2⁶²¹⁰²³ is an apocalyptic number.

621023 is a deficient number, since it is larger than the sum of its proper divisors (110113).

621023 is a wasteful number, since it uses less digits than its factorization.

621023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 621023 is about 788.0501253093. The cubic root of 621023 is about 85.3170626666.

Adding to 621023 its reverse (320126), we get a palindrome (941149).

The spelling of 621023 in words is "six hundred twenty-one thousand, twenty-three".