85807421 has 8 divisors (see below), whose sum is σ = 98387520. Its totient is φ = 73307808.

The previous prime is 85807391. The next prime is 85807427. The reversal of 85807421 is 12470858.

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

It is not a de Polignac number, because 85807421 - 2¹⁰ = 85806397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85807427) 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, 17816 + ... + 22113.

It is an arithmetic number, because the mean of its divisors is an integer number (12298440).

Almost surely, 2^85807421 is an apocalyptic number.

It is an amenable number.

85807421 is a deficient number, since it is larger than the sum of its proper divisors (12580099).

85807421 is a wasteful number, since it uses less digits than its factorization.

85807421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40243.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 85807421 is about 9263.2295124325. The cubic root of 85807421 is about 441.0707753329.

The spelling of 85807421 in words is "eighty-five million, eight hundred seven thousand, four hundred twenty-one".