42241391 has 4 divisors (see below), whose sum is σ = 43140192. Its totient is φ = 41342592.

The previous prime is 42241387. The next prime is 42241393. The reversal of 42241391 is 19314224.

42241391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42241391 - 2² = 42241387 is a prime.

It is a super-2 number, since 2×42241391² = 3568670227229762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42241391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42241393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449330 + ... + 449423.

It is an arithmetic number, because the mean of its divisors is an integer number (10785048).

Almost surely, 2^42241391 is an apocalyptic number.

42241391 is a deficient number, since it is larger than the sum of its proper divisors (898801).

42241391 is an equidigital number, since it uses as much as digits as its factorization.

42241391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898800.

The product of its digits is 1728, while the sum is 26.

The square root of 42241391 is about 6499.3377354927. The cubic root of 42241391 is about 348.2673304786.

The spelling of 42241391 in words is "forty-two million, two hundred forty-one thousand, three hundred ninety-one".