3121251 has 24 divisors (see below), whose sum is σ = 5130000. Its totient is φ = 1677312.

The previous prime is 3121249. The next prime is 3121253. The reversal of 3121251 is 1521213.

3121251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

3121251 is a nontrivial binomial coefficient, being equal to C(2499, 2).

It is an interprime number because it is at equal distance from previous prime (3121249) and next prime (3121253).

It is not a de Polignac number, because 3121251 - 2¹ = 3121249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3121251.

It is not an unprimeable number, because it can be changed into a prime (3121253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1875 + ... + 3123.

It is an arithmetic number, because the mean of its divisors is an integer number (213750).

Almost surely, 2^3121251 is an apocalyptic number.

3121251 is the 2498-th triangular number.

3121251 is a deficient number, since it is larger than the sum of its proper divisors (2008749).

3121251 is a wasteful number, since it uses less digits than its factorization.

3121251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283 (or 1276 counting only the distinct ones).

The product of its digits is 60, while the sum is 15.

The square root of 3121251 is about 1766.7062574180. The cubic root of 3121251 is about 146.1423987554.

Adding to 3121251 its reverse (1521213), we get a palindrome (4642464).

The spelling of 3121251 in words is "three million, one hundred twenty-one thousand, two hundred fifty-one".