84142312 has 8 divisors (see below), whose sum is σ = 157766850. Its totient is φ = 42071152.

The previous prime is 84142309. The next prime is 84142327. The reversal of 84142312 is 21324148.

It can be written as a sum of positive squares in only one way, i.e., 44275716 + 39866596 = 6654^2 + 6314^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258887 + ... + 5258902.

Almost surely, 2^84142312 is an apocalyptic number.

It is an amenable number.

84142312 is a deficient number, since it is larger than the sum of its proper divisors (73624538).

84142312 is a wasteful number, since it uses less digits than its factorization.

84142312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10517795 (or 10517791 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 84142312 is about 9172.9118604727. The cubic root of 84142312 is about 438.1990991023.

The spelling of 84142312 in words is "eighty-four million, one hundred forty-two thousand, three hundred twelve".