621481 has 8 divisors (see below), whose sum is σ = 725760. Its totient is φ = 521088.

The previous prime is 621473. The next prime is 621521. The reversal of 621481 is 184126.

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

It is a cyclic number.

It is not a de Polignac number, because 621481 - 2³ = 621473 is a prime.

It is a super-2 number, since 2×621481² = 772477266722, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616 + ... + 1273.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2⁶²¹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

621481 is a deficient number, since it is larger than the sum of its proper divisors (104279).

621481 is a wasteful number, since it uses less digits than its factorization.

621481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943.

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

The square root of 621481 is about 788.3406624043. The cubic root of 621481 is about 85.3380310863.

The spelling of 621481 in words is "six hundred twenty-one thousand, four hundred eighty-one".