85276721 has 4 divisors (see below), whose sum is σ = 85336944. Its totient is φ = 85216500.

The previous prime is 85276703. The next prime is 85276727. The reversal of 85276721 is 12767258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85276721 - 2¹⁴ = 85260337 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85276727) 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 3 ways as a sum of consecutive naturals, for example, 27935 + ... + 30836.

It is an arithmetic number, because the mean of its divisors is an integer number (21334236).

Almost surely, 2^85276721 is an apocalyptic number.

It is an amenable number.

85276721 is a deficient number, since it is larger than the sum of its proper divisors (60223).

85276721 is a wasteful number, since it uses less digits than its factorization.

85276721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60222.

The product of its digits is 47040, while the sum is 38.

The square root of 85276721 is about 9234.5395662155. The cubic root of 85276721 is about 440.1595857071.

The spelling of 85276721 in words is "eighty-five million, two hundred seventy-six thousand, seven hundred twenty-one".