125856321 has 16 divisors (see below), whose sum is σ = 178315200. Its totient is φ = 78959424.

The previous prime is 125856301. The next prime is 125856329. The reversal of 125856321 is 123658521.

It is not a de Polignac number, because 125856321 - 2⁶ = 125856257 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125856329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10470 + ... + 19008.

It is an arithmetic number, because the mean of its divisors is an integer number (11144700).

Almost surely, 2^125856321 is an apocalyptic number.

It is an amenable number.

125856321 is a deficient number, since it is larger than the sum of its proper divisors (52458879).

125856321 is an frugal number, since it uses more digits than its factorization.

125856321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8593 (or 8559 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 125856321 is about 11218.5703634643. The cubic root of 125856321 is about 501.1391639732.

The spelling of 125856321 in words is "one hundred twenty-five million, eight hundred fifty-six thousand, three hundred twenty-one".