42123635 has 4 divisors (see below), whose sum is σ = 50548368. Its totient is φ = 33698904.

The previous prime is 42123629. The next prime is 42123659. The reversal of 42123635 is 53632124.

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 42123635 - 2⁴ = 42123619 is a prime.

It is a super-2 number, since 2×42123635² = 3548801251226450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4212359 + ... + 4212368.

It is an arithmetic number, because the mean of its divisors is an integer number (12637092).

Almost surely, 2^42123635 is an apocalyptic number.

42123635 is a deficient number, since it is larger than the sum of its proper divisors (8424733).

42123635 is an equidigital number, since it uses as much as digits as its factorization.

42123635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8424732.

The product of its digits is 4320, while the sum is 26.

The square root of 42123635 is about 6490.2723363508. The cubic root of 42123635 is about 347.9434085763.

Adding to 42123635 its reverse (53632124), we get a palindrome (95755759).

The spelling of 42123635 in words is "forty-two million, one hundred twenty-three thousand, six hundred thirty-five".