84001571 has 2 divisors, whose sum is σ = 84001572. Its totient is φ = 84001570.

The previous prime is 84001559. The next prime is 84001633. The reversal of 84001571 is 17510048.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84001571 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84001571.

It is not a weakly prime, because it can be changed into another prime (84001271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42000785 + 42000786.

It is an arithmetic number, because the mean of its divisors is an integer number (42000786).

Almost surely, 2^84001571 is an apocalyptic number.

84001571 is a deficient number, since it is larger than the sum of its proper divisors (1).

84001571 is an equidigital number, since it uses as much as digits as its factorization.

84001571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 84001571 is about 9165.2370945874. The cubic root of 84001571 is about 437.9546442196.

The spelling of 84001571 in words is "eighty-four million, one thousand, five hundred seventy-one".