425749 has 8 divisors (see below), whose sum is σ = 450360. Its totient is φ = 401856.

The previous prime is 425713. The next prime is 425779. The reversal of 425749 is 947524.

425749 = 3² + 4² + ... + 108².

It can be written as a sum of positive squares in 4 ways, for example, as 47524 + 378225 = 218^2 + 615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 425749 - 2⁹ = 425237 is a prime.

It is a super-2 number, since 2×425749² = 362524422002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 425749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1399 + ... + 1675.

It is an arithmetic number, because the mean of its divisors is an integer number (56295).

2⁴²⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

425749 is a deficient number, since it is larger than the sum of its proper divisors (24611).

425749 is a wasteful number, since it uses less digits than its factorization.

425749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its digits is 10080, while the sum is 31.

The square root of 425749 is about 652.4944444208. The cubic root of 425749 is about 75.2288712327.

The spelling of 425749 in words is "four hundred twenty-five thousand, seven hundred forty-nine".