425557 has 6 divisors (see below), whose sum is σ = 467894. Its totient is φ = 386760.

The previous prime is 425549. The next prime is 425563. The reversal of 425557 is 755524.

It can be written as a sum of positive squares in only one way, i.e., 421201 + 4356 = 649^2 + 66^2 .

It is not a de Polignac number, because 425557 - 2³ = 425549 is a prime.

It is a Duffinian number.

425557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1638 + ... + 1879.

2⁴²⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

425557 is a deficient number, since it is larger than the sum of its proper divisors (42337).

425557 is a wasteful number, since it uses less digits than its factorization.

425557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539 (or 3528 counting only the distinct ones).

The product of its digits is 7000, while the sum is 28.

The square root of 425557 is about 652.3473001400. The cubic root of 425557 is about 75.2175608792.

The spelling of 425557 in words is "four hundred twenty-five thousand, five hundred fifty-seven".