3128425 has 18 divisors (see below), whose sum is σ = 4130378. Its totient is φ = 2350080.

The previous prime is 3128401. The next prime is 3128443. The reversal of 3128425 is 5248213.

It can be written as a sum of positive squares in 9 ways, for example, as 619369 + 2509056 = 787^2 + 1584^2 .

It is not a de Polignac number, because 3128425 - 2⁵ = 3128393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 3128425.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7009 + ... + 7441.

Almost surely, 2^3128425 is an apocalyptic number.

It is an amenable number.

3128425 is a deficient number, since it is larger than the sum of its proper divisors (1001953).

3128425 is a wasteful number, since it uses less digits than its factorization.

3128425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 455 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 3128425 is about 1768.7354239682. The cubic root of 3128425 is about 146.2542794667.

It can be divided in two parts, 3128 and 425, that added together give a palindrome (3553).

The spelling of 3128425 in words is "three million, one hundred twenty-eight thousand, four hundred twenty-five".