85146821 has 8 divisors (see below), whose sum is σ = 86733504. Its totient is φ = 83571040.

The previous prime is 85146811. The next prime is 85146823. The reversal of 85146821 is 12864158.

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 85146821 - 2¹⁸ = 84884677 is a prime.

It is a super-2 number, since 2×85146821² = 14499962252812082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85146823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13970 + ... + 19116.

It is an arithmetic number, because the mean of its divisors is an integer number (10841688).

Almost surely, 2^85146821 is an apocalyptic number.

It is an amenable number.

85146821 is a deficient number, since it is larger than the sum of its proper divisors (1586683).

85146821 is a wasteful number, since it uses less digits than its factorization.

85146821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5451.

The product of its digits is 15360, while the sum is 35.

The square root of 85146821 is about 9227.5035085336. The cubic root of 85146821 is about 439.9359772550.

The spelling of 85146821 in words is "eighty-five million, one hundred forty-six thousand, eight hundred twenty-one".