85421169 has 32 divisors (see below), whose sum is σ = 135094400. Its totient is φ = 53187840.

The previous prime is 85421159. The next prime is 85421179. The reversal of 85421169 is 96112458.

It is an interprime number because it is at equal distance from previous prime (85421159) and next prime (85421179).

It is not a de Polignac number, because 85421169 - 2¹⁷ = 85290097 is a prime.

It is a super-2 number, since 2×85421169² = 14593552226653122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85421159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36309 + ... + 38589.

It is an arithmetic number, because the mean of its divisors is an integer number (4221700).

Almost surely, 2^85421169 is an apocalyptic number.

It is an amenable number.

85421169 is a deficient number, since it is larger than the sum of its proper divisors (49673231).

85421169 is a wasteful number, since it uses less digits than its factorization.

85421169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382 (or 2376 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 85421169 is about 9242.3573291666. The cubic root of 85421169 is about 440.4079704398.

The spelling of 85421169 in words is "eighty-five million, four hundred twenty-one thousand, one hundred sixty-nine".