42573523 has 2 divisors, whose sum is σ = 42573524. Its totient is φ = 42573522.

The previous prime is 42573431. The next prime is 42573563. The reversal of 42573523 is 32537524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42573523 is a prime.

It is not a weakly prime, because it can be changed into another prime (42573563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21286761 + 21286762.

It is an arithmetic number, because the mean of its divisors is an integer number (21286762).

Almost surely, 2^42573523 is an apocalyptic number.

42573523 is a deficient number, since it is larger than the sum of its proper divisors (1).

42573523 is an equidigital number, since it uses as much as digits as its factorization.

42573523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 31.

The square root of 42573523 is about 6524.8389252149. The cubic root of 42573523 is about 349.1777241128.

The spelling of 42573523 in words is "forty-two million, five hundred seventy-three thousand, five hundred twenty-three".