85129051 has 4 divisors (see below), whose sum is σ = 97290352. Its totient is φ = 72967752.

The previous prime is 85129039. The next prime is 85129067. The reversal of 85129051 is 15092158.

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

It is a cyclic number.

It is not a de Polignac number, because 85129051 - 2⁹ = 85128539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85129091) 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, 6080640 + ... + 6080653.

It is an arithmetic number, because the mean of its divisors is an integer number (24322588).

Almost surely, 2^85129051 is an apocalyptic number.

85129051 is a deficient number, since it is larger than the sum of its proper divisors (12161301).

85129051 is a wasteful number, since it uses less digits than its factorization.

85129051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12161300.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 85129051 is about 9226.5405759689. The cubic root of 85129051 is about 439.9053704900.

The spelling of 85129051 in words is "eighty-five million, one hundred twenty-nine thousand, fifty-one".