2042391 has 8 divisors (see below), whose sum is σ = 2932720. Its totient is φ = 1256832.

The previous prime is 2042389. The next prime is 2042393. The reversal of 2042391 is 1932402.

It is an interprime number because it is at equal distance from previous prime (2042389) and next prime (2042393).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2042391 - 2¹ = 2042389 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 (2042393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26146 + ... + 26223.

It is an arithmetic number, because the mean of its divisors is an integer number (366590).

2^2042391 is an apocalyptic number.

2042391 is a deficient number, since it is larger than the sum of its proper divisors (890329).

2042391 is a wasteful number, since it uses less digits than its factorization.

2042391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52385.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 2042391 is about 1429.1224580140. The cubic root of 2042391 is about 126.8760441403.

Adding to 2042391 its reverse (1932402), we get a palindrome (3974793).

The spelling of 2042391 in words is "two million, forty-two thousand, three hundred ninety-one".