621251461 has 4 divisors (see below), whose sum is σ = 621805792. Its totient is φ = 620697132.

The previous prime is 621251453. The next prime is 621251479. The reversal of 621251461 is 164152126.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 621251461 - 2³ = 621251453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621251441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275481 + ... + 277726.

It is an arithmetic number, because the mean of its divisors is an integer number (155451448).

Almost surely, 2^621251461 is an apocalyptic number.

It is an amenable number.

621251461 is a deficient number, since it is larger than the sum of its proper divisors (554331).

621251461 is a wasteful number, since it uses less digits than its factorization.

621251461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554330.

The product of its digits is 2880, while the sum is 28.

The square root of 621251461 is about 24924.9164692683. The cubic root of 621251461 is about 853.2752348785.

The spelling of 621251461 in words is "six hundred twenty-one million, two hundred fifty-one thousand, four hundred sixty-one".