621148975 has 48 divisors (see below), whose sum is σ = 855882720. Its totient is φ = 445132800.

The previous prime is 621148963. The next prime is 621148981. The reversal of 621148975 is 579841126.

It is not a de Polignac number, because 621148975 - 2⁵ = 621148943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 748861 + ... + 749689.

It is an arithmetic number, because the mean of its divisors is an integer number (17830890).

It is the magic constant of a 1075 × 1075 magic square.

Almost surely, 2^621148975 is an apocalyptic number.

621148975 is a deficient number, since it is larger than the sum of its proper divisors (234733745).

621148975 is a wasteful number, since it uses less digits than its factorization.

621148975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 935 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 621148975 is about 24922.8604899197. The cubic root of 621148975 is about 853.2283115415.

The spelling of 621148975 in words is "six hundred twenty-one million, one hundred forty-eight thousand, nine hundred seventy-five".