125192449 has 4 divisors (see below), whose sum is σ = 129509460. Its totient is φ = 120875440.

The previous prime is 125192447. The next prime is 125192489. The reversal of 125192449 is 944291521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944291521 = 101 ⋅9349421.

It can be written as a sum of positive squares in 2 ways, for example, as 80730225 + 44462224 = 8985^2 + 6668^2 .

It is a cyclic number.

It is not a de Polignac number, because 125192449 - 2¹ = 125192447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125192447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2158462 + ... + 2158519.

It is an arithmetic number, because the mean of its divisors is an integer number (32377365).

Almost surely, 2^125192449 is an apocalyptic number.

It is an amenable number.

125192449 is a deficient number, since it is larger than the sum of its proper divisors (4317011).

125192449 is an equidigital number, since it uses as much as digits as its factorization.

125192449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4317010.

The product of its digits is 25920, while the sum is 37.

The square root of 125192449 is about 11188.9431583148. The cubic root of 125192449 is about 500.2564670934.

The spelling of 125192449 in words is "one hundred twenty-five million, one hundred ninety-two thousand, four hundred forty-nine".