85440921 has 8 divisors (see below), whose sum is σ = 114686400. Its totient is φ = 56578032.

The previous prime is 85440911. The next prime is 85440961. The reversal of 85440921 is 12904458.

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

It is not a de Polignac number, because 85440921 - 2⁶ = 85440857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85440911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95125 + ... + 96018.

It is an arithmetic number, because the mean of its divisors is an integer number (14335800).

Almost surely, 2^85440921 is an apocalyptic number.

It is an amenable number.

85440921 is a deficient number, since it is larger than the sum of its proper divisors (29245479).

85440921 is a wasteful number, since it uses less digits than its factorization.

85440921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191295.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 85440921 is about 9243.4258259587. The cubic root of 85440921 is about 440.4419131105.

The spelling of 85440921 in words is "eighty-five million, four hundred forty thousand, nine hundred twenty-one".