3121975 has 12 divisors (see below), whose sum is σ = 3955104. Its totient is φ = 2443520.

The previous prime is 3121973. The next prime is 3121981. The reversal of 3121975 is 5791213.

It is not a de Polignac number, because 3121975 - 2¹ = 3121973 is a prime.

It is a Duffinian number.

3121975 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121973) 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, 154 + ... + 2503.

It is an arithmetic number, because the mean of its divisors is an integer number (329592).

Almost surely, 2^3121975 is an apocalyptic number.

3121975 is a deficient number, since it is larger than the sum of its proper divisors (833129).

3121975 is a wasteful number, since it uses less digits than its factorization.

3121975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714 (or 2709 counting only the distinct ones).

The product of its digits is 1890, while the sum is 28.

The square root of 3121975 is about 1766.9111466059. The cubic root of 3121975 is about 146.1536975281.

It can be divided in two parts, 3121 and 975, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3121975 in words is "three million, one hundred twenty-one thousand, nine hundred seventy-five".