125725081 has 4 divisors (see below), whose sum is σ = 133120692. Its totient is φ = 118329472.

The previous prime is 125725027. The next prime is 125725091. The reversal of 125725081 is 180527521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93915481 + 31809600 = 9691^2 + 5640^2 .

It is a cyclic number.

It is not a de Polignac number, because 125725081 - 2⁹ = 125724569 is a prime.

It is a super-2 number, since 2×125725081² = 31613591984913122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125725021) 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 3 ways as a sum of consecutive naturals, for example, 3697780 + ... + 3697813.

It is an arithmetic number, because the mean of its divisors is an integer number (33280173).

Almost surely, 2^125725081 is an apocalyptic number.

It is an amenable number.

125725081 is a deficient number, since it is larger than the sum of its proper divisors (7395611).

125725081 is an equidigital number, since it uses as much as digits as its factorization.

125725081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7395610.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 125725081 is about 11212.7196076599. The cubic root of 125725081 is about 500.9649113610.

The spelling of 125725081 in words is "one hundred twenty-five million, seven hundred twenty-five thousand, eighty-one".