42126655 has 4 divisors (see below), whose sum is σ = 50551992. Its totient is φ = 33701320.

The previous prime is 42126631. The next prime is 42126673. The reversal of 42126655 is 55662124.

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

It is not a de Polignac number, because 42126655 - 2⁹ = 42126143 is a prime.

It is a super-2 number, since 2×42126655² = 3549310122978050, which contains 22 as substring.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4212661 + ... + 4212670.

It is an arithmetic number, because the mean of its divisors is an integer number (12637998).

Almost surely, 2^42126655 is an apocalyptic number.

42126655 is a deficient number, since it is larger than the sum of its proper divisors (8425337).

42126655 is an equidigital number, since it uses as much as digits as its factorization.

42126655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8425336.

The product of its digits is 14400, while the sum is 31.

The square root of 42126655 is about 6490.5049880576. The cubic root of 42126655 is about 347.9517234965.

Adding to 42126655 its reverse (55662124), we get a palindrome (97788779).

The spelling of 42126655 in words is "forty-two million, one hundred twenty-six thousand, six hundred fifty-five".