3121225 has 12 divisors (see below), whose sum is σ = 4074640. Its totient is φ = 2365200.

The previous prime is 3121219. The next prime is 3121229. The reversal of 3121225 is 5221213.

It is not a de Polignac number, because 3121225 - 2⁵ = 3121193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3121199 and 3121208.

It is not an unprimeable number, because it can be changed into a prime (3121229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2811 + ... + 3760.

Almost surely, 2^3121225 is an apocalyptic number.

It is an amenable number.

3121225 is a deficient number, since it is larger than the sum of its proper divisors (953415).

3121225 is a wasteful number, since it uses less digits than its factorization.

3121225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6600 (or 6595 counting only the distinct ones).

The product of its digits is 120, while the sum is 16.

The square root of 3121225 is about 1766.6988990770. The cubic root of 3121225 is about 146.1419929658.

Adding to 3121225 its reverse (5221213), we get a palindrome (8342438).

The spelling of 3121225 in words is "three million, one hundred twenty-one thousand, two hundred twenty-five".