42126811 has 4 divisors (see below), whose sum is σ = 42139872. Its totient is φ = 42113752.

The previous prime is 42126793. The next prime is 42126827. The reversal of 42126811 is 11862124.

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 is a cyclic number.

It is not a de Polignac number, because 42126811 - 2⁵ = 42126779 is a prime.

It is a super-3 number, since 3×42126811³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42126871) 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, 2190 + ... + 9436.

It is an arithmetic number, because the mean of its divisors is an integer number (10534968).

Almost surely, 2^42126811 is an apocalyptic number.

42126811 is a deficient number, since it is larger than the sum of its proper divisors (13061).

42126811 is an equidigital number, since it uses as much as digits as its factorization.

42126811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13060.

The product of its digits is 768, while the sum is 25.

The square root of 42126811 is about 6490.5170056013. The cubic root of 42126811 is about 347.9521529981.

Adding to 42126811 its reverse (11862124), we get a palindrome (53988935).

The spelling of 42126811 in words is "forty-two million, one hundred twenty-six thousand, eight hundred eleven".