125125817 has 4 divisors (see below), whose sum is σ = 125387520. Its totient is φ = 124864116.

The previous prime is 125125801. The next prime is 125125837. The reversal of 125125817 is 718521521.

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 125125817 - 2⁴ = 125125801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125125837) 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, 130133 + ... + 131090.

It is an arithmetic number, because the mean of its divisors is an integer number (31346880).

Almost surely, 2^125125817 is an apocalyptic number.

It is an amenable number.

125125817 is a deficient number, since it is larger than the sum of its proper divisors (261703).

125125817 is an equidigital number, since it uses as much as digits as its factorization.

125125817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261702.

The product of its digits is 5600, while the sum is 32.

The square root of 125125817 is about 11185.9651796347. The cubic root of 125125817 is about 500.1676997473.

The spelling of 125125817 in words is "one hundred twenty-five million, one hundred twenty-five thousand, eight hundred seventeen".