42193391 has 4 divisors (see below), whose sum is σ = 42208152. Its totient is φ = 42178632.

The previous prime is 42193381. The next prime is 42193399. The reversal of 42193391 is 19339124.

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 42193391 - 2¹⁴ = 42177007 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 (42193399) 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, 1565 + ... + 9318.

It is an arithmetic number, because the mean of its divisors is an integer number (10552038).

Almost surely, 2^42193391 is an apocalyptic number.

42193391 is a deficient number, since it is larger than the sum of its proper divisors (14761).

42193391 is a wasteful number, since it uses less digits than its factorization.

42193391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14760.

The product of its digits is 5832, while the sum is 32.

The square root of 42193391 is about 6495.6440019447. The cubic root of 42193391 is about 348.1353653815.

The spelling of 42193391 in words is "forty-two million, one hundred ninety-three thousand, three hundred ninety-one".