125250161 has 2 divisors, whose sum is σ = 125250162. Its totient is φ = 125250160.

The previous prime is 125250133. The next prime is 125250193. The reversal of 125250161 is 161052521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71301136 + 53949025 = 8444^2 + 7345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125250161 is a prime.

It is a Chen prime.

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

It is not a weakly prime, because it can be changed into another prime (125250061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62625080 + 62625081.

It is an arithmetic number, because the mean of its divisors is an integer number (62625081).

Almost surely, 2^125250161 is an apocalyptic number.

It is an amenable number.

125250161 is a deficient number, since it is larger than the sum of its proper divisors (1).

125250161 is an equidigital number, since it uses as much as digits as its factorization.

125250161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 125250161 is about 11191.5218357469. The cubic root of 125250161 is about 500.3333257385. Note that the first 4 decimals are identical.

The spelling of 125250161 in words is "one hundred twenty-five million, two hundred fifty thousand, one hundred sixty-one".