125070581 has 4 divisors (see below), whose sum is σ = 132427692. Its totient is φ = 117713472.

The previous prime is 125070563. The next prime is 125070587. The reversal of 125070581 is 185070521.

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 77598481 + 47472100 = 8809^2 + 6890^2 .

It is a cyclic number.

It is not a de Polignac number, because 125070581 - 2²² = 120876277 is a prime.

It is a super-2 number, since 2×125070581² = 31285300463355122, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125070587) 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, 3678530 + ... + 3678563.

It is an arithmetic number, because the mean of its divisors is an integer number (33106923).

Almost surely, 2^125070581 is an apocalyptic number.

It is an amenable number.

125070581 is a deficient number, since it is larger than the sum of its proper divisors (7357111).

125070581 is an equidigital number, since it uses as much as digits as its factorization.

125070581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7357110.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 125070581 is about 11183.4959203283. The cubic root of 125070581 is about 500.0940902929.

The spelling of 125070581 in words is "one hundred twenty-five million, seventy thousand, five hundred eighty-one".