42126577 has 4 divisors (see below), whose sum is σ = 42139636. Its totient is φ = 42113520.

The previous prime is 42126569. The next prime is 42126619. The reversal of 42126577 is 77562124.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 32615521 + 9511056 = 5711^2 + 3084^2 .

It is a cyclic number.

It is not a de Polignac number, because 42126577 - 2³ = 42126569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42126517) 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, 2203 + ... + 9439.

It is an arithmetic number, because the mean of its divisors is an integer number (10534909).

Almost surely, 2^42126577 is an apocalyptic number.

It is an amenable number.

42126577 is a deficient number, since it is larger than the sum of its proper divisors (13059).

42126577 is an equidigital number, since it uses as much as digits as its factorization.

42126577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13058.

The product of its digits is 23520, while the sum is 34.

The square root of 42126577 is about 6490.4989792773. The cubic root of 42126577 is about 347.9515087452.

The spelling of 42126577 in words is "forty-two million, one hundred twenty-six thousand, five hundred seventy-seven".