125291081 has 2 divisors, whose sum is σ = 125291082. Its totient is φ = 125291080.

The previous prime is 125291059. The next prime is 125291087. The reversal of 125291081 is 180192521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68740681 + 56550400 = 8291^2 + 7520^2 .

It is an emirp because it is prime and its reverse (180192521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125291081 - 2⁶ = 125291017 is a prime.

It is a super-2 number, since 2×125291081² = 31395709956297122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125291087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62645540 + 62645541.

It is an arithmetic number, because the mean of its divisors is an integer number (62645541).

Almost surely, 2^125291081 is an apocalyptic number.

It is an amenable number.

125291081 is a deficient number, since it is larger than the sum of its proper divisors (1).

125291081 is an equidigital number, since it uses as much as digits as its factorization.

125291081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 125291081 is about 11193.3498560529. The cubic root of 125291081 is about 500.3878071335.

Adding to 125291081 its product of nonzero digits (1440), we get a palindrome (125292521).

The spelling of 125291081 in words is "one hundred twenty-five million, two hundred ninety-one thousand, eighty-one".