425819 has 2 divisors, whose sum is σ = 425820. Its totient is φ = 425818.

The previous prime is 425813. The next prime is 425837. The reversal of 425819 is 918524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425819 - 2⁸ = 425563 is a prime.

It is a super-2 number, since 2×425819² = 362643641522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 425791 and 425800.

It is not a weakly prime, because it can be changed into another prime (425813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212909 + 212910.

It is an arithmetic number, because the mean of its divisors is an integer number (212910).

2⁴²⁵⁸¹⁹ is an apocalyptic number.

425819 is a deficient number, since it is larger than the sum of its proper divisors (1).

425819 is an equidigital number, since it uses as much as digits as its factorization.

425819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 425819 is about 652.5480825196. The cubic root of 425819 is about 75.2329939532.

The spelling of 425819 in words is "four hundred twenty-five thousand, eight hundred nineteen".