125496109 has 2 divisors, whose sum is σ = 125496110. Its totient is φ = 125496108.

The previous prime is 125496097. The next prime is 125496131. The reversal of 125496109 is 901694521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119355625 + 6140484 = 10925^2 + 2478^2 .

It is a cyclic number.

It is not a de Polignac number, because 125496109 - 2¹⁵ = 125463341 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 (125496139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62748054 + 62748055.

It is an arithmetic number, because the mean of its divisors is an integer number (62748055).

Almost surely, 2^125496109 is an apocalyptic number.

It is an amenable number.

125496109 is a deficient number, since it is larger than the sum of its proper divisors (1).

125496109 is an equidigital number, since it uses as much as digits as its factorization.

125496109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 125496109 is about 11202.5045860290. The cubic root of 125496109 is about 500.6606054831.

The spelling of 125496109 in words is "one hundred twenty-five million, four hundred ninety-six thousand, one hundred nine".