426525189421 has 2 divisors, whose sum is σ = 426525189422. Its totient is φ = 426525189420.

The previous prime is 426525189353. The next prime is 426525189463. The reversal of 426525189421 is 124981525624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375139100196 + 51386089225 = 612486^2 + 226685^2 .

It is a cyclic number.

It is not a de Polignac number, because 426525189421 - 2²¹ = 426523092269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426525189721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213262594710 + 213262594711.

It is an arithmetic number, because the mean of its divisors is an integer number (213262594711).

Almost surely, 2^426525189421 is an apocalyptic number.

It is an amenable number.

426525189421 is a deficient number, since it is larger than the sum of its proper divisors (1).

426525189421 is an equidigital number, since it uses as much as digits as its factorization.

426525189421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 49.

The spelling of 426525189421 in words is "four hundred twenty-six billion, five hundred twenty-five million, one hundred eighty-nine thousand, four hundred twenty-one".