42501123 has 24 divisors (see below), whose sum is σ = 72060768. Its totient is φ = 23628672.

The previous prime is 42501091. The next prime is 42501161. The reversal of 42501123 is 32110524.

42501123 is a `hidden beast` number, since 42 + 501 + 123 = 666.

It is not a de Polignac number, because 42501123 - 2⁵ = 42501091 is a prime.

It is a super-2 number, since 2×42501123² = 3612690912522258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42501096 and 42501105.

It is not an unprimeable number, because it can be changed into a prime (42501163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6786 + ... + 11447.

It is an arithmetic number, because the mean of its divisors is an integer number (3002532).

Almost surely, 2^42501123 is an apocalyptic number.

42501123 is a deficient number, since it is larger than the sum of its proper divisors (29559645).

42501123 is a wasteful number, since it uses less digits than its factorization.

42501123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18283 (or 18280 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 42501123 is about 6519.2885348019. The cubic root of 42501123 is about 348.9796760495.

Adding to 42501123 its reverse (32110524), we get a palindrome (74611647).

It can be divided in two parts, 42501 and 123, that added together give a palindrome (42624).

The spelling of 42501123 in words is "forty-two million, five hundred one thousand, one hundred twenty-three".