621137 has 4 divisors (see below), whose sum is σ = 677616. Its totient is φ = 564660.

The previous prime is 621133. The next prime is 621139. The reversal of 621137 is 731126.

It is a happy number.

621137 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 a cyclic number.

It is not a de Polignac number, because 621137 - 2² = 621133 is a prime.

It is a super-2 number, since 2×621137² = 771622345538, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621137.

It is not an unprimeable number, because it can be changed into a prime (621133) 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, 28223 + ... + 28244.

It is an arithmetic number, because the mean of its divisors is an integer number (169404).

2⁶²¹¹³⁷ is an apocalyptic number.

It is an amenable number.

621137 is a deficient number, since it is larger than the sum of its proper divisors (56479).

621137 is a wasteful number, since it uses less digits than its factorization.

621137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56478.

The product of its digits is 252, while the sum is 20.

The square root of 621137 is about 788.1224524146. The cubic root of 621137 is about 85.3222828437.

The spelling of 621137 in words is "six hundred twenty-one thousand, one hundred thirty-seven".