125001181 has 2 divisors, whose sum is σ = 125001182. Its totient is φ = 125001180.

The previous prime is 125001143. The next prime is 125001193. The reversal of 125001181 is 181100521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63457156 + 61544025 = 7966^2 + 7845^2 .

It is a cyclic number.

It is not a de Polignac number, because 125001181 - 2⁷ = 125001053 is a prime.

It is a super-2 number, since 2×125001181² = 31250590502789522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125001581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62500590 + 62500591.

It is an arithmetic number, because the mean of its divisors is an integer number (62500591).

Almost surely, 2^125001181 is an apocalyptic number.

It is an amenable number.

125001181 is a deficient number, since it is larger than the sum of its proper divisors (1).

125001181 is an equidigital number, since it uses as much as digits as its factorization.

125001181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 125001181 is about 11180.3927032998. The cubic root of 125001181 is about 500.0015746617.

The spelling of 125001181 in words is "one hundred twenty-five million, one thousand, one hundred eighty-one".