621197 has 4 divisors (see below), whose sum is σ = 657756. Its totient is φ = 584640.

The previous prime is 621143. The next prime is 621217. The reversal of 621197 is 791126.

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

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 75076 = 739^2 + 274^2 .

It is a cyclic number.

It is not a de Polignac number, because 621197 - 2⁶ = 621133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18254 + ... + 18287.

It is an arithmetic number, because the mean of its divisors is an integer number (164439).

2⁶²¹¹⁹⁷ is an apocalyptic number.

It is an amenable number.

621197 is a deficient number, since it is larger than the sum of its proper divisors (36559).

621197 is a wasteful number, since it uses less digits than its factorization.

621197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36558.

The product of its digits is 756, while the sum is 26.

The square root of 621197 is about 788.1605166462. The cubic root of 621197 is about 85.3250300487.

It can be divided in two parts, 62119 and 7, that added together give a palindrome (62126).

The spelling of 621197 in words is "six hundred twenty-one thousand, one hundred ninety-seven".