425250434821 has 2 divisors, whose sum is σ = 425250434822. Its totient is φ = 425250434820.

The previous prime is 425250434771. The next prime is 425250434831. The reversal of 425250434821 is 128434052524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302863108900 + 122387325921 = 550330^2 + 349839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425250434821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425250434831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212625217410 + 212625217411.

It is an arithmetic number, because the mean of its divisors is an integer number (212625217411).

Almost surely, 2^425250434821 is an apocalyptic number.

It is an amenable number.

425250434821 is a deficient number, since it is larger than the sum of its proper divisors (1).

425250434821 is an equidigital number, since it uses as much as digits as its factorization.

425250434821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 307200, while the sum is 40.

The spelling of 425250434821 in words is "four hundred twenty-five billion, two hundred fifty million, four hundred thirty-four thousand, eight hundred twenty-one".