621146 has 8 divisors (see below), whose sum is σ = 986580. Its totient is φ = 292288.

The previous prime is 621143. The next prime is 621217. The reversal of 621146 is 641126.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 579121 + 42025 = 761^2 + 205^2 .

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621146.

It is not an unprimeable number, because it can be changed into a prime (621143) 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, 9101 + ... + 9168.

2⁶²¹¹⁴⁶ is an apocalyptic number.

621146 is a deficient number, since it is larger than the sum of its proper divisors (365434).

621146 is a wasteful number, since it uses less digits than its factorization.

621146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18288.

The product of its digits is 288, while the sum is 20.

The square root of 621146 is about 788.1281621665. The cubic root of 621146 is about 85.3226949357.

Subtracting from 621146 its sum of digits (20), we obtain a palindrome (621126).

It can be divided in two parts, 621 and 146, that added together give a palindrome (767).

The spelling of 621146 in words is "six hundred twenty-one thousand, one hundred forty-six".