84127742 has 4 divisors (see below), whose sum is σ = 126191616. Its totient is φ = 42063870.

The previous prime is 84127733. The next prime is 84127793. The reversal of 84127742 is 24772148.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21031934 + ... + 21031937.

It is an arithmetic number, because the mean of its divisors is an integer number (31547904).

Almost surely, 2^84127742 is an apocalyptic number.

84127742 is a deficient number, since it is larger than the sum of its proper divisors (42063874).

84127742 is a wasteful number, since it uses less digits than its factorization.

84127742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42063873.

The product of its digits is 25088, while the sum is 35.

The square root of 84127742 is about 9172.1176398910. The cubic root of 84127742 is about 438.1738049339.

The spelling of 84127742 in words is "eighty-four million, one hundred twenty-seven thousand, seven hundred forty-two".