85752921 has 4 divisors (see below), whose sum is σ = 114337232. Its totient is φ = 57168612.

The previous prime is 85752917. The next prime is 85752941. The reversal of 85752921 is 12925758.

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 not a de Polignac number, because 85752921 - 2² = 85752917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85752921.

It is not an unprimeable number, because it can be changed into a prime (85752941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14292151 + ... + 14292156.

It is an arithmetic number, because the mean of its divisors is an integer number (28584308).

Almost surely, 2^85752921 is an apocalyptic number.

It is an amenable number.

85752921 is a deficient number, since it is larger than the sum of its proper divisors (28584311).

85752921 is a wasteful number, since it uses less digits than its factorization.

85752921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28584310.

The product of its digits is 50400, while the sum is 39.

The square root of 85752921 is about 9260.2873065580. The cubic root of 85752921 is about 440.9773745212.

The spelling of 85752921 in words is "eighty-five million, seven hundred fifty-two thousand, nine hundred twenty-one".