85924561 has 4 divisors (see below), whose sum is σ = 88020324. Its totient is φ = 83828800.

The previous prime is 85924547. The next prime is 85924567. The reversal of 85924561 is 16542958.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23814400 + 62110161 = 4880^2 + 7881^2 .

It is a cyclic number.

It is not a de Polignac number, because 85924561 - 2⁹ = 85924049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85924567) 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, 1047820 + ... + 1047901.

It is an arithmetic number, because the mean of its divisors is an integer number (22005081).

Almost surely, 2^85924561 is an apocalyptic number.

It is an amenable number.

85924561 is a deficient number, since it is larger than the sum of its proper divisors (2095763).

85924561 is a wasteful number, since it uses less digits than its factorization.

85924561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095762.

The product of its digits is 86400, while the sum is 40.

The square root of 85924561 is about 9269.5502048373. The cubic root of 85924561 is about 441.2713933243.

The spelling of 85924561 in words is "eighty-five million, nine hundred twenty-four thousand, five hundred sixty-one".