125190581 has 2 divisors, whose sum is σ = 125190582. Its totient is φ = 125190580.

The previous prime is 125190551. The next prime is 125190613. The reversal of 125190581 is 185091521.

It is an a-pointer prime, because the next prime (125190613) can be obtained adding 125190581 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89680900 + 35509681 = 9470^2 + 5959^2 .

It is a cyclic number.

It is not a de Polignac number, because 125190581 - 2¹⁴ = 125174197 is a prime.

It is a super-2 number, since 2×125190581² = 31345363142235122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125190511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62595290 + 62595291.

It is an arithmetic number, because the mean of its divisors is an integer number (62595291).

Almost surely, 2^125190581 is an apocalyptic number.

It is an amenable number.

125190581 is a deficient number, since it is larger than the sum of its proper divisors (1).

125190581 is an equidigital number, since it uses as much as digits as its factorization.

125190581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 32.

The square root of 125190581 is about 11188.8596827380. The cubic root of 125190581 is about 500.2539789675.

The spelling of 125190581 in words is "one hundred twenty-five million, one hundred ninety thousand, five hundred eighty-one".