85720425 has 96 divisors (see below), whose sum is σ = 175226880. Its totient is φ = 36115200.

The previous prime is 85720423. The next prime is 85720441. The reversal of 85720425 is 52402758.

It is not a de Polignac number, because 85720425 - 2¹ = 85720423 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85720423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 374211 + ... + 374439.

It is an arithmetic number, because the mean of its divisors is an integer number (1825280).

Almost surely, 2^85720425 is an apocalyptic number.

It is an amenable number.

85720425 is an abundant number, since it is smaller than the sum of its proper divisors (89506455).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85720425 is a wasteful number, since it uses less digits than its factorization.

85720425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 85720425 is about 9258.5325511120. The cubic root of 85720425 is about 440.9216648105.

The spelling of 85720425 in words is "eighty-five million, seven hundred twenty thousand, four hundred twenty-five".