2421587621 has 2 divisors, whose sum is σ = 2421587622. Its totient is φ = 2421587620.

The previous prime is 2421587617. The next prime is 2421587657. The reversal of 2421587621 is 1267851242.

2421587621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2062068100 + 359519521 = 45410^2 + 18961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421587621 - 2² = 2421587617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421587611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210793810 + 1210793811.

It is an arithmetic number, because the mean of its divisors is an integer number (1210793811).

Almost surely, 2^2421587621 is an apocalyptic number.

It is an amenable number.

2421587621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421587621 is an equidigital number, since it uses as much as digits as its factorization.

2421587621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 38.

The square root of 2421587621 is about 49209.6293523940. The cubic root of 2421587621 is about 1342.8682197468.

The spelling of 2421587621 in words is "two billion, four hundred twenty-one million, five hundred eighty-seven thousand, six hundred twenty-one".