125725517 has 4 divisors (see below), whose sum is σ = 128400576. Its totient is φ = 123050460.

The previous prime is 125725511. The next prime is 125725529. The reversal of 125725517 is 715527521.

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, and also an emirpimes, since its reverse is a distinct semiprime: 715527521 = 239 ⋅2993839.

It is a cyclic number.

It is not a de Polignac number, because 125725517 - 2¹⁶ = 125659981 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 (125725511) 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, 1337459 + ... + 1337552.

It is an arithmetic number, because the mean of its divisors is an integer number (32100144).

Almost surely, 2^125725517 is an apocalyptic number.

It is an amenable number.

125725517 is a deficient number, since it is larger than the sum of its proper divisors (2675059).

125725517 is an equidigital number, since it uses as much as digits as its factorization.

125725517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675058.

The product of its digits is 24500, while the sum is 35.

The square root of 125725517 is about 11212.7390498486. The cubic root of 125725517 is about 500.9654904564.

The spelling of 125725517 in words is "one hundred twenty-five million, seven hundred twenty-five thousand, five hundred seventeen".