2691243 has 6 divisors (see below), whose sum is σ = 3887364. Its totient is φ = 1794156.

The previous prime is 2691239. The next prime is 2691251. The reversal of 2691243 is 3421962.

It is not a de Polignac number, because 2691243 - 2² = 2691239 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 6⁴ + 9⁵ + 1 + 2²¹ + 4⁴ + 3¹² .

2691243 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2691223) 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, 149505 + ... + 149522.

It is an arithmetic number, because the mean of its divisors is an integer number (647894).

2^2691243 is an apocalyptic number.

2691243 is a deficient number, since it is larger than the sum of its proper divisors (1196121).

2691243 is a wasteful number, since it uses less digits than its factorization.

2691243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299033 (or 299030 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 2691243 is about 1640.5008381589. The cubic root of 2691243 is about 139.0969597638.

The spelling of 2691243 in words is "two million, six hundred ninety-one thousand, two hundred forty-three".