125717549 has 4 divisors (see below), whose sum is σ = 125743200. Its totient is φ = 125691900.

The previous prime is 125717539. The next prime is 125717551. The reversal of 125717549 is 945717521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125717549 - 2²⁴ = 108940333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125717539) 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, 2927 + ... + 16124.

It is an arithmetic number, because the mean of its divisors is an integer number (31435800).

Almost surely, 2^125717549 is an apocalyptic number.

It is an amenable number.

125717549 is a deficient number, since it is larger than the sum of its proper divisors (25651).

125717549 is an equidigital number, since it uses as much as digits as its factorization.

125717549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25650.

The product of its digits is 88200, while the sum is 41.

The square root of 125717549 is about 11212.3837340683. The cubic root of 125717549 is about 500.9549071437.

The spelling of 125717549 in words is "one hundred twenty-five million, seven hundred seventeen thousand, five hundred forty-nine".