2931121 has 4 divisors (see below), whose sum is σ = 2960244. Its totient is φ = 2902000.

The previous prime is 2931113. The next prime is 2931127. The reversal of 2931121 is 1211392.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2852721 + 78400 = 1689^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 2931121 - 2³ = 2931113 is a prime.

It is an Ulam number.

It is a Duffinian number.

2931121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2931127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14410 + ... + 14611.

It is an arithmetic number, because the mean of its divisors is an integer number (740061).

2^2931121 is an apocalyptic number.

It is an amenable number.

2931121 is a deficient number, since it is larger than the sum of its proper divisors (29123).

2931121 is a wasteful number, since it uses less digits than its factorization.

2931121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29122.

The product of its digits is 108, while the sum is 19.

The square root of 2931121 is about 1712.0516931448. The cubic root of 2931121 is about 143.1126144390.

The spelling of 2931121 in words is "two million, nine hundred thirty-one thousand, one hundred twenty-one".