42112523 has 4 divisors (see below), whose sum is σ = 43091928. Its totient is φ = 41133120.

The previous prime is 42112513. The next prime is 42112537. The reversal of 42112523 is 32521124.

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 42112523 - 2⁴ = 42112507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42112495 and 42112504.

It is not an unprimeable number, because it can be changed into a prime (42112513) 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, 489638 + ... + 489723.

It is an arithmetic number, because the mean of its divisors is an integer number (10772982).

Almost surely, 2^42112523 is an apocalyptic number.

42112523 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

42112523 is a deficient number, since it is larger than the sum of its proper divisors (979405).

42112523 is an equidigital number, since it uses as much as digits as its factorization.

42112523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979404.

The product of its digits is 480, while the sum is 20.

The square root of 42112523 is about 6489.4162295233. The cubic root of 42112523 is about 347.9128106536.

Adding to 42112523 its reverse (32521124), we get a palindrome (74633647).

The spelling of 42112523 in words is "forty-two million, one hundred twelve thousand, five hundred twenty-three".