621148 has 24 divisors (see below), whose sum is σ = 1249920. Its totient is φ = 267120.

The previous prime is 621143. The next prime is 621217. The reversal of 621148 is 841126.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 465 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (52080).

2⁶²¹¹⁴⁸ is an apocalyptic number.

It is an amenable number.

621148 is an abundant number, since it is smaller than the sum of its proper divisors (628772).

It is a weird number, because it is abundant, but not a pseudoperfect number.

621148 is a wasteful number, since it uses less digits than its factorization.

621148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 775 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 621148 is about 788.1294309947. The cubic root of 621148 is about 85.3227865112.

Subtracting from 621148 its sum of digits (22), we obtain a palindrome (621126).

The spelling of 621148 in words is "six hundred twenty-one thousand, one hundred forty-eight".