125866049 has 2 divisors, whose sum is σ = 125866050. Its totient is φ = 125866048.

The previous prime is 125866021. The next prime is 125866093. The reversal of 125866049 is 940668521.

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., 81577024 + 44289025 = 9032^2 + 6655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125866049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 125865997 and 125866015.

It is not a weakly prime, because it can be changed into another prime (125866019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62933024 + 62933025.

It is an arithmetic number, because the mean of its divisors is an integer number (62933025).

Almost surely, 2^125866049 is an apocalyptic number.

It is an amenable number.

125866049 is a deficient number, since it is larger than the sum of its proper divisors (1).

125866049 is an equidigital number, since it uses as much as digits as its factorization.

125866049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 125866049 is about 11219.0039219175. The cubic root of 125866049 is about 501.1520754057.

The spelling of 125866049 in words is "one hundred twenty-five million, eight hundred sixty-six thousand, forty-nine".