125866523 has 4 divisors (see below), whose sum is σ = 125902560. Its totient is φ = 125830488.

The previous prime is 125866463. The next prime is 125866549. The reversal of 125866523 is 325668521.

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 125866523 - 2⁶ = 125866459 is a prime.

It is a super-3 number, since 3×125866523³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125866553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12140 + ... + 19977.

It is an arithmetic number, because the mean of its divisors is an integer number (31475640).

Almost surely, 2^125866523 is an apocalyptic number.

125866523 is a deficient number, since it is larger than the sum of its proper divisors (36037).

125866523 is an equidigital number, since it uses as much as digits as its factorization.

125866523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36036.

The product of its digits is 86400, while the sum is 38.

The square root of 125866523 is about 11219.0250467677. The cubic root of 125866523 is about 501.1527045025.

The spelling of 125866523 in words is "one hundred twenty-five million, eight hundred sixty-six thousand, five hundred twenty-three".