125270209 has 2 divisors, whose sum is σ = 125270210. Its totient is φ = 125270208.

The previous prime is 125270179. The next prime is 125270231. The reversal of 125270209 is 902072521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94633984 + 30636225 = 9728^2 + 5535^2 .

It is a cyclic number.

It is not a de Polignac number, because 125270209 - 2¹⁷ = 125139137 is a prime.

It is not a weakly prime, because it can be changed into another prime (125270269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62635104 + 62635105.

It is an arithmetic number, because the mean of its divisors is an integer number (62635105).

Almost surely, 2^125270209 is an apocalyptic number.

It is an amenable number.

125270209 is a deficient number, since it is larger than the sum of its proper divisors (1).

125270209 is an equidigital number, since it uses as much as digits as its factorization.

125270209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 125270209 is about 11192.4174779178. The cubic root of 125270209 is about 500.3600193765.

The spelling of 125270209 in words is "one hundred twenty-five million, two hundred seventy thousand, two hundred nine".