621475 has 6 divisors (see below), whose sum is σ = 770660. Its totient is φ = 497160.

The previous prime is 621473. The next prime is 621521. The reversal of 621475 is 574126.

It is not a de Polignac number, because 621475 - 2¹ = 621473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 24859 = 621475 / (6 + 2 + 1 + 4 + 7 + 5).

It is not an unprimeable number, because it can be changed into a prime (621473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12405 + ... + 12454.

2⁶²¹⁴⁷⁵ is an apocalyptic number.

621475 is a deficient number, since it is larger than the sum of its proper divisors (149185).

621475 is a wasteful number, since it uses less digits than its factorization.

621475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24869 (or 24864 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 621475 is about 788.3368569336. The cubic root of 621475 is about 85.3377564575.

The spelling of 621475 in words is "six hundred twenty-one thousand, four hundred seventy-five".