12342991 has 6 divisors (see below), whose sum is σ = 12761376. Its totient is φ = 11925900.

The previous prime is 12342983. The next prime is 12342997. The reversal of 12342991 is 19924321.

12342991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12342991 - 2³ = 12342983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12342997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19246 + ... + 19876.

It is an arithmetic number, because the mean of its divisors is an integer number (2126896).

Almost surely, 2^12342991 is an apocalyptic number.

12342991 is a deficient number, since it is larger than the sum of its proper divisors (418385).

12342991 is an frugal number, since it uses more digits than its factorization.

12342991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 662 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 12342991 is about 3513.2593129457. The cubic root of 12342991 is about 231.1036496930.

Multiplying 12342991 by its sum of digits (31), we get a square (382632721 = 19561²).

12342991 divided by its sum of digits (31) gives a square (398161 = 631²).

It can be divided in two parts, 1234 and 2991, that added together give a square (4225 = 65²).

The spelling of 12342991 in words is "twelve million, three hundred forty-two thousand, nine hundred ninety-one".