125766181 has 2 divisors, whose sum is σ = 125766182. Its totient is φ = 125766180.

The previous prime is 125766161. The next prime is 125766233. The reversal of 125766181 is 181667521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90897156 + 34869025 = 9534^2 + 5905^2 .

It is a cyclic number.

It is not a de Polignac number, because 125766181 - 2¹⁷ = 125635109 is a prime.

It is a super-2 number, since 2×125766181² = 31634264566649522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125766181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125766131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62883090 + 62883091.

It is an arithmetic number, because the mean of its divisors is an integer number (62883091).

Almost surely, 2^125766181 is an apocalyptic number.

It is an amenable number.

125766181 is a deficient number, since it is larger than the sum of its proper divisors (1).

125766181 is an equidigital number, since it uses as much as digits as its factorization.

125766181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 125766181 is about 11214.5521979257. The cubic root of 125766181 is about 501.0194945157.

The spelling of 125766181 in words is "one hundred twenty-five million, seven hundred sixty-six thousand, one hundred eighty-one".