864860125 has 16 divisors (see below), whose sum is σ = 1142839152. Its totient is φ = 651187200.

The previous prime is 864860119. The next prime is 864860147. The reversal of 864860125 is 521068468.

It can be written as a sum of positive squares in 8 ways, for example, as 34786404 + 830073721 = 5898^2 + 28811^2 .

It is a de Polignac number, because none of the positive numbers 2^k-864860125 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201372 + ... + 205621.

It is an arithmetic number, because the mean of its divisors is an integer number (71427447).

Almost surely, 2^864860125 is an apocalyptic number.

864860125 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

864860125 is a deficient number, since it is larger than the sum of its proper divisors (277979027).

864860125 is a wasteful number, since it uses less digits than its factorization.

864860125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407025 (or 407015 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 864860125 is about 29408.5042972267. The cubic root of 864860125 is about 952.7565826856.

The spelling of 864860125 in words is "eight hundred sixty-four million, eight hundred sixty thousand, one hundred twenty-five".