125722165 has 8 divisors (see below), whose sum is σ = 150930360. Its totient is φ = 100535232.

The previous prime is 125722151. The next prime is 125722169. The reversal of 125722165 is 561227521.

It can be written as a sum of positive squares in 4 ways, for example, as 125316 + 125596849 = 354^2 + 11207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125722165 - 2²¹ = 123625013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125722169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14251 + ... + 21319.

It is an arithmetic number, because the mean of its divisors is an integer number (18866295).

Almost surely, 2^125722165 is an apocalyptic number.

It is an amenable number.

125722165 is a deficient number, since it is larger than the sum of its proper divisors (25208195).

125722165 is an equidigital number, since it uses as much as digits as its factorization.

125722165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10631.

The product of its digits is 8400, while the sum is 31.

The square root of 125722165 is about 11212.5895760079. The cubic root of 125722165 is about 500.9610382940.

Adding to 125722165 its reverse (561227521), we get a palindrome (686949686).

The spelling of 125722165 in words is "one hundred twenty-five million, seven hundred twenty-two thousand, one hundred sixty-five".