3121275 has 12 divisors (see below), whose sum is σ = 5160632. Its totient is φ = 1664640.

The previous prime is 3121273. The next prime is 3121291. The reversal of 3121275 is 5721213.

It is not a de Polignac number, because 3121275 - 2¹ = 3121273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20734 + ... + 20883.

Almost surely, 2^3121275 is an apocalyptic number.

3121275 is a deficient number, since it is larger than the sum of its proper divisors (2039357).

3121275 is a wasteful number, since it uses less digits than its factorization.

3121275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41630 (or 41625 counting only the distinct ones).

The product of its digits is 420, while the sum is 21.

The square root of 3121275 is about 1766.7130497056. The cubic root of 3121275 is about 146.1427733283.

Adding to 3121275 its reverse (5721213), we get a palindrome (8842488).

It can be divided in two parts, 31212 and 75, that multiplied together give a square (2340900 = 1530²).

The spelling of 3121275 in words is "three million, one hundred twenty-one thousand, two hundred seventy-five".