3121425 has 18 divisors (see below), whose sum is σ = 5591222. Its totient is φ = 1664640.

The previous prime is 3121423. The next prime is 3121427. The reversal of 3121425 is 5241213.

It is an interprime number because it is at equal distance from previous prime (3121423) and next prime (3121427).

It can be written as a sum of positive squares in 3 ways, for example, as 166464 + 2954961 = 408^2 + 1719^2 .

It is not a de Polignac number, because 3121425 - 2¹ = 3121423 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3121398 and 3121407.

It is not an unprimeable number, because it can be changed into a prime (3121423) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6712 + ... + 7161.

Almost surely, 2^3121425 is an apocalyptic number.

It is an amenable number.

3121425 is a deficient number, since it is larger than the sum of its proper divisors (2469797).

3121425 is a wasteful number, since it uses less digits than its factorization.

3121425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13889 (or 13881 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 3121425 is about 1766.7555009112. The cubic root of 3121425 is about 146.1451143658.

Adding to 3121425 its reverse (5241213), we get a palindrome (8362638).

The spelling of 3121425 in words is "three million, one hundred twenty-one thousand, four hundred twenty-five".