2345125621 has 2 divisors, whose sum is σ = 2345125622. Its totient is φ = 2345125620.

The previous prime is 2345125619. The next prime is 2345125637. The reversal of 2345125621 is 1265215432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2125671025 + 219454596 = 46105^2 + 14814^2 .

It is a cyclic number.

It is not a de Polignac number, because 2345125621 - 2¹ = 2345125619 is a prime.

It is a super-2 number, since 2×2345125621² = 10999228356541271282, which contains 22 as substring.

Together with 2345125619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2345125691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1172562810 + 1172562811.

It is an arithmetic number, because the mean of its divisors is an integer number (1172562811).

Almost surely, 2^2345125621 is an apocalyptic number.

It is an amenable number.

2345125621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2345125621 is an equidigital number, since it uses as much as digits as its factorization.

2345125621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 2345125621 is about 48426.4970961146. The cubic root of 2345125621 is about 1328.5830389523.

The spelling of 2345125621 in words is "two billion, three hundred forty-five million, one hundred twenty-five thousand, six hundred twenty-one".