2012391 has 16 divisors (see below), whose sum is σ = 3025120. Its totient is φ = 1321920.

The previous prime is 2012383. The next prime is 2012401. The reversal of 2012391 is 1932102.

It is a happy number.

It is not a de Polignac number, because 2012391 - 2³ = 2012383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1461 + ... + 2481.

It is an arithmetic number, because the mean of its divisors is an integer number (189070).

2^2012391 is an apocalyptic number.

2012391 is a deficient number, since it is larger than the sum of its proper divisors (1012729).

2012391 is a wasteful number, since it uses less digits than its factorization.

2012391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 2012391 is about 1418.5876779389. The cubic root of 2012391 is about 126.2517641815.

Adding to 2012391 its reverse (1932102), we get a palindrome (3944493).

The spelling of 2012391 in words is "two million, twelve thousand, three hundred ninety-one".