840427127 has 4 divisors (see below), whose sum is σ = 840506016. Its totient is φ = 840348240.

The previous prime is 840427111. The next prime is 840427129. The reversal of 840427127 is 721724048.

It is a happy number.

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 840427127 - 2⁴ = 840427111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840427129) 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, 20399 + ... + 45792.

It is an arithmetic number, because the mean of its divisors is an integer number (210126504).

Almost surely, 2^840427127 is an apocalyptic number.

840427127 is a deficient number, since it is larger than the sum of its proper divisors (78889).

840427127 is a wasteful number, since it uses less digits than its factorization.

840427127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78888.

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

The square root of 840427127 is about 28990.1211967111. The cubic root of 840427127 is about 943.6986939230.

The spelling of 840427127 in words is "eight hundred forty million, four hundred twenty-seven thousand, one hundred twenty-seven".