42049523 has 4 divisors (see below), whose sum is σ = 42063168. Its totient is φ = 42035880.

The previous prime is 42049499. The next prime is 42049529. The reversal of 42049523 is 32594024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42049523 - 2¹⁰ = 42048499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42049529) 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, 233 + ... + 9173.

It is an arithmetic number, because the mean of its divisors is an integer number (10515792).

Almost surely, 2^42049523 is an apocalyptic number.

42049523 is a deficient number, since it is larger than the sum of its proper divisors (13645).

42049523 is an equidigital number, since it uses as much as digits as its factorization.

42049523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13644.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 42049523 is about 6484.5603551821. The cubic root of 42049523 is about 347.7392324670.

The spelling of 42049523 in words is "forty-two million, forty-nine thousand, five hundred twenty-three".