125728187 has 16 divisors (see below), whose sum is σ = 143512320. Its totient is φ = 109188000.

The previous prime is 125728177. The next prime is 125728201. The reversal of 125728187 is 781827521.

It is a cyclic number.

It is not a de Polignac number, because 125728187 - 2¹⁸ = 125466043 is a prime.

It is a super-3 number, since 3×125728187³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (125728117) 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, 35612 + ... + 38982.

It is an arithmetic number, because the mean of its divisors is an integer number (8969520).

Almost surely, 2^125728187 is an apocalyptic number.

125728187 is a deficient number, since it is larger than the sum of its proper divisors (17784133).

125728187 is a wasteful number, since it uses less digits than its factorization.

125728187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554.

The product of its digits is 62720, while the sum is 41.

The square root of 125728187 is about 11212.8581102233. The cubic root of 125728187 is about 500.9690367224.

The spelling of 125728187 in words is "one hundred twenty-five million, seven hundred twenty-eight thousand, one hundred eighty-seven".