127725145 has 8 divisors (see below), whose sum is σ = 153868104. Its totient is φ = 101781504.

The previous prime is 127725133. The next prime is 127725167. The reversal of 127725145 is 541527721.

It can be written as a sum of positive squares in 4 ways, for example, as 44769481 + 82955664 = 6691^2 + 9108^2 .

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 127725145 - 2¹⁵ = 127692377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127725145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48414 + ... + 50983.

It is an arithmetic number, because the mean of its divisors is an integer number (19233513).

Almost surely, 2^127725145 is an apocalyptic number.

It is an amenable number.

127725145 is a deficient number, since it is larger than the sum of its proper divisors (26142959).

127725145 is an equidigital number, since it uses as much as digits as its factorization.

127725145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99659.

The product of its digits is 19600, while the sum is 34.

The square root of 127725145 is about 11301.5549815059. The cubic root of 127725145 is about 503.6074368708.

The spelling of 127725145 in words is "one hundred twenty-seven million, seven hundred twenty-five thousand, one hundred forty-five".