425851 has 2 divisors, whose sum is σ = 425852. Its totient is φ = 425850.

The previous prime is 425839. The next prime is 425857. The reversal of 425851 is 158524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 425851 - 2⁵ = 425819 is a prime.

It is a d-powerful number, because it can be written as 4⁷ + 2¹⁷ + 8⁶ + 5⁴ + 5⁶ + 1 .

It is not a weakly prime, because it can be changed into another prime (425857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212925 + 212926.

It is an arithmetic number, because the mean of its divisors is an integer number (212926).

2⁴²⁵⁸⁵¹ is an apocalyptic number.

425851 is a deficient number, since it is larger than the sum of its proper divisors (1).

425851 is an equidigital number, since it uses as much as digits as its factorization.

425851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1600, while the sum is 25.

The square root of 425851 is about 652.5726013249. The cubic root of 425851 is about 75.2348784750.

It can be divided in two parts, 425 and 851, that multiplied together give a triangular number (361675 = T₈₅₀).

The spelling of 425851 in words is "four hundred twenty-five thousand, eight hundred fifty-one".