84142971 has 24 divisors (see below), whose sum is σ = 133286400. Its totient is φ = 50727600.

The previous prime is 84142957. The next prime is 84142987. The reversal of 84142971 is 17924148.

It is not a de Polignac number, because 84142971 - 2⁶ = 84142907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84142871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17566 + ... + 21836.

It is an arithmetic number, because the mean of its divisors is an integer number (5553600).

Almost surely, 2^84142971 is an apocalyptic number.

84142971 is a deficient number, since it is larger than the sum of its proper divisors (49143429).

84142971 is a wasteful number, since it uses less digits than its factorization.

84142971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487 (or 4484 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 84142971 is about 9172.9477813841. The cubic root of 84142971 is about 438.2002430866.

The spelling of 84142971 in words is "eighty-four million, one hundred forty-two thousand, nine hundred seventy-one".