42442523 has 16 divisors (see below), whose sum is σ = 47809440. Its totient is φ = 37440000.

The previous prime is 42442483. The next prime is 42442541. The reversal of 42442523 is 32524424.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42442523 - 2¹⁸ = 42180379 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42442492 and 42442501.

It is not an unprimeable number, because it can be changed into a prime (42442583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31973 + ... + 33273.

It is an arithmetic number, because the mean of its divisors is an integer number (2988090).

Almost surely, 2^42442523 is an apocalyptic number.

42442523 is a deficient number, since it is larger than the sum of its proper divisors (5366917).

42442523 is a wasteful number, since it uses less digits than its factorization.

42442523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438.

The product of its digits is 7680, while the sum is 26.

The square root of 42442523 is about 6514.7926290865. The cubic root of 42442523 is about 348.8192127205.

Adding to 42442523 its reverse (32524424), we get a palindrome (74966947).

The spelling of 42442523 in words is "forty-two million, four hundred forty-two thousand, five hundred twenty-three".