125281717 has 4 divisors (see below), whose sum is σ = 136670976. Its totient is φ = 113892460.

The previous prime is 125281679. The next prime is 125281753. The reversal of 125281717 is 717182521.

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: 717182521 = 11 ⋅65198411.

It is a de Polignac number, because none of the positive numbers 2^k-125281717 is a prime.

It is a super-2 number, since 2×125281717² = 31391017228936178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125281217) 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, 5694613 + ... + 5694634.

It is an arithmetic number, because the mean of its divisors is an integer number (34167744).

Almost surely, 2^125281717 is an apocalyptic number.

It is an amenable number.

125281717 is a deficient number, since it is larger than the sum of its proper divisors (11389259).

125281717 is a wasteful number, since it uses less digits than its factorization.

125281717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11389258.

The product of its digits is 7840, while the sum is 34.

The square root of 125281717 is about 11192.9315641614. The cubic root of 125281717 is about 500.3753408347.

The spelling of 125281717 in words is "one hundred twenty-five million, two hundred eighty-one thousand, seven hundred seventeen".