84142774 has 4 divisors (see below), whose sum is σ = 126214164. Its totient is φ = 42071386.

The previous prime is 84142769. The next prime is 84142777. The reversal of 84142774 is 47724148.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84142777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21035692 + ... + 21035695.

It is an arithmetic number, because the mean of its divisors is an integer number (31553541).

Almost surely, 2^84142774 is an apocalyptic number.

84142774 is a deficient number, since it is larger than the sum of its proper divisors (42071390).

84142774 is a wasteful number, since it uses less digits than its factorization.

84142774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42071389.

The product of its digits is 50176, while the sum is 37.

The square root of 84142774 is about 9172.9370432812. The cubic root of 84142774 is about 438.1999011071.

The spelling of 84142774 in words is "eighty-four million, one hundred forty-two thousand, seven hundred seventy-four".