245125311421 has 2 divisors, whose sum is σ = 245125311422. Its totient is φ = 245125311420.

The previous prime is 245125311407. The next prime is 245125311461. The reversal of 245125311421 is 124113521542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202062836196 + 43062475225 = 449514^2 + 207515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245125311421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245125311461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122562655710 + 122562655711.

It is an arithmetic number, because the mean of its divisors is an integer number (122562655711).

Almost surely, 2^245125311421 is an apocalyptic number.

It is an amenable number.

245125311421 is a deficient number, since it is larger than the sum of its proper divisors (1).

245125311421 is an equidigital number, since it uses as much as digits as its factorization.

245125311421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 31.

Adding to 245125311421 its reverse (124113521542), we get a palindrome (369238832963).

The spelling of 245125311421 in words is "two hundred forty-five billion, one hundred twenty-five million, three hundred eleven thousand, four hundred twenty-one".