125452109 has 2 divisors, whose sum is σ = 125452110. Its totient is φ = 125452108.

The previous prime is 125452091. The next prime is 125452127. The reversal of 125452109 is 901254521.

Together with previous prime (125452091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (125452091) and next prime (125452127).

It can be written as a sum of positive squares in only one way, i.e., 111239209 + 14212900 = 10547^2 + 3770^2 .

It is a cyclic number.

It is not a de Polignac number, because 125452109 - 2²⁴ = 108674893 is a prime.

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 (125412109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62726054 + 62726055.

It is an arithmetic number, because the mean of its divisors is an integer number (62726055).

Almost surely, 2^125452109 is an apocalyptic number.

It is an amenable number.

125452109 is a deficient number, since it is larger than the sum of its proper divisors (1).

125452109 is an equidigital number, since it uses as much as digits as its factorization.

125452109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 125452109 is about 11200.5405673119. The cubic root of 125452109 is about 500.6020866922.

The spelling of 125452109 in words is "one hundred twenty-five million, four hundred fifty-two thousand, one hundred nine".