42406753 has 4 divisors (see below), whose sum is σ = 42782148. Its totient is φ = 42031360.

The previous prime is 42406747. The next prime is 42406757. The reversal of 42406753 is 35760424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11404129 + 31002624 = 3377^2 + 5568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42406753 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42406757) by changing a digit.

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, 187528 + ... + 187753.

It is an arithmetic number, because the mean of its divisors is an integer number (10695537).

Almost surely, 2^42406753 is an apocalyptic number.

It is an amenable number.

42406753 is a deficient number, since it is larger than the sum of its proper divisors (375395).

42406753 is a wasteful number, since it uses less digits than its factorization.

42406753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375394.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 42406753 is about 6512.0467596601. The cubic root of 42406753 is about 348.7211917640.

The spelling of 42406753 in words is "forty-two million, four hundred six thousand, seven hundred fifty-three".