85734021 has 8 divisors (see below), whose sum is σ = 116249760. Its totient is φ = 56187152.

The previous prime is 85733987. The next prime is 85734031. The reversal of 85734021 is 12043758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85734021 - 2⁶ = 85733957 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85734021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85734031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242010 + ... + 242363.

It is an arithmetic number, because the mean of its divisors is an integer number (14531220).

Almost surely, 2^85734021 is an apocalyptic number.

It is an amenable number.

85734021 is a deficient number, since it is larger than the sum of its proper divisors (30515739).

85734021 is a wasteful number, since it uses less digits than its factorization.

85734021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484435.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 85734021 is about 9259.2667636266. The cubic root of 85734021 is about 440.9449749066.

Adding to 85734021 its reverse (12043758), we get a palindrome (97777779).

The spelling of 85734021 in words is "eighty-five million, seven hundred thirty-four thousand, twenty-one".