42256542 has 16 divisors (see below), whose sum is σ = 84658320. Its totient is φ = 14061312.

The previous prime is 42256541. The next prime is 42256559. The reversal of 42256542 is 24565224.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42256541) 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 7 ways as a sum of consecutive naturals, for example, 2067 + ... + 9422.

It is an arithmetic number, because the mean of its divisors is an integer number (5291145).

Almost surely, 2^42256542 is an apocalyptic number.

42256542 is an abundant number, since it is smaller than the sum of its proper divisors (42401778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42256542 is a wasteful number, since it uses less digits than its factorization.

42256542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12107.

The product of its digits is 19200, while the sum is 30.

The square root of 42256542 is about 6500.5032112906. The cubic root of 42256542 is about 348.3089639527.

The spelling of 42256542 in words is "forty-two million, two hundred fifty-six thousand, five hundred forty-two".