3121233425 has 6 divisors (see below), whose sum is σ = 3870329478. Its totient is φ = 2496986720.

The previous prime is 3121233361. The next prime is 3121233433. The reversal of 3121233425 is 5243321213.

It is a happy number.

It is a Cunningham number, because it is equal to 55868²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 3121233424 = 1^2 + 55868^2 .

It is not a de Polignac number, because 3121233425 - 2⁶ = 3121233361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121233394 and 3121233403.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62424644 + ... + 62424693.

It is an arithmetic number, because the mean of its divisors is an integer number (645054913).

Almost surely, 2^3121233425 is an apocalyptic number.

It is an amenable number.

3121233425 is a deficient number, since it is larger than the sum of its proper divisors (749096053).

3121233425 is a wasteful number, since it uses less digits than its factorization.

3121233425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124849347 (or 124849342 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 3121233425 is about 55868.0000089497. Note that the first 5 decimals coincide. The cubic root of 3121233425 is about 1461.4212445751.

Adding to 3121233425 its reverse (5243321213), we get a palindrome (8364554638).

The spelling of 3121233425 in words is "three billion, one hundred twenty-one million, two hundred thirty-three thousand, four hundred twenty-five".