245122621 has 2 divisors, whose sum is σ = 245122622. Its totient is φ = 245122620.

The previous prime is 245122613. The next prime is 245122627. The reversal of 245122621 is 126221542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205922500 + 39200121 = 14350^2 + 6261^2 .

It is a cyclic number.

It is not a de Polignac number, because 245122621 - 2³ = 245122613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245122627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122561310 + 122561311.

It is an arithmetic number, because the mean of its divisors is an integer number (122561311).

Almost surely, 2^245122621 is an apocalyptic number.

It is an amenable number.

245122621 is a deficient number, since it is larger than the sum of its proper divisors (1).

245122621 is an equidigital number, since it uses as much as digits as its factorization.

245122621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 245122621 is about 15656.3923366783. The cubic root of 245122621 is about 625.8368489141.

The spelling of 245122621 in words is "two hundred forty-five million, one hundred twenty-two thousand, six hundred twenty-one".