425431134521 has 2 divisors, whose sum is σ = 425431134522. Its totient is φ = 425431134520.

The previous prime is 425431134431. The next prime is 425431134559. The reversal of 425431134521 is 125431134524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412754851600 + 12676282921 = 642460^2 + 112589^2 .

It is a cyclic number.

It is not a de Polignac number, because 425431134521 - 2³⁴ = 408251265337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (425431734521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212715567260 + 212715567261.

It is an arithmetic number, because the mean of its divisors is an integer number (212715567261).

Almost surely, 2^425431134521 is an apocalyptic number.

It is an amenable number.

425431134521 is a deficient number, since it is larger than the sum of its proper divisors (1).

425431134521 is an equidigital number, since it uses as much as digits as its factorization.

425431134521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 35.

The spelling of 425431134521 in words is "four hundred twenty-five billion, four hundred thirty-one million, one hundred thirty-four thousand, five hundred twenty-one".