42149591 has 4 divisors (see below), whose sum is σ = 45981384. Its totient is φ = 38317800.

The previous prime is 42149561. The next prime is 42149609. The reversal of 42149591 is 19594124.

42149591 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 42149591 - 2¹⁰ = 42148567 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 (42149521) 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, 1915880 + ... + 1915901.

It is an arithmetic number, because the mean of its divisors is an integer number (11495346).

Almost surely, 2^42149591 is an apocalyptic number.

42149591 is a deficient number, since it is larger than the sum of its proper divisors (3831793).

42149591 is a wasteful number, since it uses less digits than its factorization.

42149591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831792.

The product of its digits is 12960, while the sum is 35.

The square root of 42149591 is about 6492.2716363381. The cubic root of 42149591 is about 348.0148598710.

The spelling of 42149591 in words is "forty-two million, one hundred forty-nine thousand, five hundred ninety-one".