125214181 has 2 divisors, whose sum is σ = 125214182. Its totient is φ = 125214180.

The previous prime is 125214169. The next prime is 125214191. The reversal of 125214181 is 181412521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73805281 + 51408900 = 8591^2 + 7170^2 .

It is an emirp because it is prime and its reverse (181412521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125214181 - 2⁵ = 125214149 is a prime.

It is a super-2 number, since 2×125214181² = 31357182247001522, which contains 22 as substring.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125214101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62607090 + 62607091.

It is an arithmetic number, because the mean of its divisors is an integer number (62607091).

Almost surely, 2^125214181 is an apocalyptic number.

125214181 is the 6461-st hex number.

It is an amenable number.

125214181 is a deficient number, since it is larger than the sum of its proper divisors (1).

125214181 is an equidigital number, since it uses as much as digits as its factorization.

125214181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640, while the sum is 25.

The square root of 125214181 is about 11189.9142534695. The cubic root of 125214181 is about 500.2854117160.

The spelling of 125214181 in words is "one hundred twenty-five million, two hundred fourteen thousand, one hundred eighty-one".