125305571 has 4 divisors (see below), whose sum is σ = 125362512. Its totient is φ = 125248632.

The previous prime is 125305559. The next prime is 125305591. The reversal of 125305571 is 175503521.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125305571 is a prime.

It is a super-2 number, since 2×125305571² = 31402972247272082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125305591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25031 + ... + 29616.

It is an arithmetic number, because the mean of its divisors is an integer number (31340628).

Almost surely, 2^125305571 is an apocalyptic number.

125305571 is a deficient number, since it is larger than the sum of its proper divisors (56941).

125305571 is an equidigital number, since it uses as much as digits as its factorization.

125305571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56940.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 125305571 is about 11193.9970966585. The cubic root of 125305571 is about 500.4070964550.

The spelling of 125305571 in words is "one hundred twenty-five million, three hundred five thousand, five hundred seventy-one".