125540569 has 16 divisors (see below), whose sum is σ = 157280256. Its totient is φ = 97347600.

The previous prime is 125540551. The next prime is 125540579. The reversal of 125540569 is 965045521.

It is not a de Polignac number, because 125540569 - 2⁵ = 125540537 is a prime.

It is a super-2 number, since 2×125540569² = 31520868929687522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125540539) 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 15 ways as a sum of consecutive naturals, for example, 12384 + ... + 20110.

It is an arithmetic number, because the mean of its divisors is an integer number (9830016).

Almost surely, 2^125540569 is an apocalyptic number.

It is an amenable number.

125540569 is a deficient number, since it is larger than the sum of its proper divisors (31739687).

125540569 is a wasteful number, since it uses less digits than its factorization.

125540569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7956.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 125540569 is about 11204.4887879814. The cubic root of 125540569 is about 500.7197221696.

The spelling of 125540569 in words is "one hundred twenty-five million, five hundred forty thousand, five hundred sixty-nine".