425678251 has 2 divisors, whose sum is σ = 425678252. Its totient is φ = 425678250.

The previous prime is 425678237. The next prime is 425678263. The reversal of 425678251 is 152876524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425678251 is a prime.

It is not a weakly prime, because it can be changed into another prime (425678951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212839125 + 212839126.

It is an arithmetic number, because the mean of its divisors is an integer number (212839126).

Almost surely, 2^425678251 is an apocalyptic number.

425678251 is a deficient number, since it is larger than the sum of its proper divisors (1).

425678251 is an equidigital number, since it uses as much as digits as its factorization.

425678251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134400, while the sum is 40.

The square root of 425678251 is about 20631.9715732646. The cubic root of 425678251 is about 752.2470393989.

The spelling of 425678251 in words is "four hundred twenty-five million, six hundred seventy-eight thousand, two hundred fifty-one".