3128485 has 4 divisors (see below), whose sum is σ = 3754188. Its totient is φ = 2502784.

The previous prime is 3128453. The next prime is 3128501. The reversal of 3128485 is 5848213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5848213 = 7 ⋅835459.

It can be written as a sum of positive squares in 2 ways, for example, as 2490084 + 638401 = 1578^2 + 799^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128485 - 2⁵ = 3128453 is a prime.

It is a Duffinian number.

3128485 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312844 + ... + 312853.

It is an arithmetic number, because the mean of its divisors is an integer number (938547).

Almost surely, 2^3128485 is an apocalyptic number.

It is an amenable number.

3128485 is a deficient number, since it is larger than the sum of its proper divisors (625703).

3128485 is an equidigital number, since it uses as much as digits as its factorization.

3128485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625702.

The product of its digits is 7680, while the sum is 31.

The square root of 3128485 is about 1768.7523851574. The cubic root of 3128485 is about 146.2552144633.

The spelling of 3128485 in words is "three million, one hundred twenty-eight thousand, four hundred eighty-five".