125536865 has 4 divisors (see below), whose sum is σ = 150644244. Its totient is φ = 100429488.

The previous prime is 125536861. The next prime is 125536867. The reversal of 125536865 is 568635521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568635521 = 71 ⋅8008951.

It can be written as a sum of positive squares in 2 ways, for example, as 59228416 + 66308449 = 7696^2 + 8143^2 .

It is a cyclic number.

It is not a de Polignac number, because 125536865 - 2² = 125536861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125536861) 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, 12553682 + ... + 12553691.

It is an arithmetic number, because the mean of its divisors is an integer number (37661061).

Almost surely, 2^125536865 is an apocalyptic number.

It is an amenable number.

125536865 is a deficient number, since it is larger than the sum of its proper divisors (25107379).

125536865 is an equidigital number, since it uses as much as digits as its factorization.

125536865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25107378.

The product of its digits is 216000, while the sum is 41.

The square root of 125536865 is about 11204.3234958653. The cubic root of 125536865 is about 500.7147976417.

The spelling of 125536865 in words is "one hundred twenty-five million, five hundred thirty-six thousand, eight hundred sixty-five".