2242391 has 4 divisors (see below), whose sum is σ = 2256312. Its totient is φ = 2228472.

The previous prime is 2242381. The next prime is 2242433. The reversal of 2242391 is 1932422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1932422 = 2 ⋅966211.

It is a cyclic number.

It is not a de Polignac number, because 2242391 - 2¹⁸ = 1980247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2242381) 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, 6716 + ... + 7041.

It is an arithmetic number, because the mean of its divisors is an integer number (564078).

2^2242391 is an apocalyptic number.

2242391 is a deficient number, since it is larger than the sum of its proper divisors (13921).

2242391 is a wasteful number, since it uses less digits than its factorization.

2242391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13920.

The product of its digits is 864, while the sum is 23.

The square root of 2242391 is about 1497.4615187042. The cubic root of 2242391 is about 130.8891901362.

The spelling of 2242391 in words is "two million, two hundred forty-two thousand, three hundred ninety-one".