125709247 has 4 divisors (see below), whose sum is σ = 129764416. Its totient is φ = 121654080.

The previous prime is 125709217. The next prime is 125709281. The reversal of 125709247 is 742907521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125709247 - 2⁷ = 125709119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125709217) 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, 2027538 + ... + 2027599.

It is an arithmetic number, because the mean of its divisors is an integer number (32441104).

Almost surely, 2^125709247 is an apocalyptic number.

125709247 is a deficient number, since it is larger than the sum of its proper divisors (4055169).

125709247 is an equidigital number, since it uses as much as digits as its factorization.

125709247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4055168.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 125709247 is about 11212.0135123001. The cubic root of 125709247 is about 500.9438797276.

The spelling of 125709247 in words is "one hundred twenty-five million, seven hundred nine thousand, two hundred forty-seven".