127825561 has 8 divisors (see below), whose sum is σ = 131491584. Its totient is φ = 124210320.

The previous prime is 127825553. The next prime is 127825573. The reversal of 127825561 is 165528721.

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 127825561 - 2³ = 127825553 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 127825561.

It is not an unprimeable number, because it can be changed into a prime (127825501) by changing a digit.

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, 7561 + ... + 17686.

It is an arithmetic number, because the mean of its divisors is an integer number (16436448).

Almost surely, 2^127825561 is an apocalyptic number.

It is an amenable number.

127825561 is a deficient number, since it is larger than the sum of its proper divisors (3666023).

127825561 is an equidigital number, since it uses as much as digits as its factorization.

127825561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25391.

The product of its digits is 33600, while the sum is 37.

The square root of 127825561 is about 11305.9966831766. The cubic root of 127825561 is about 503.7393790387.

The spelling of 127825561 in words is "one hundred twenty-seven million, eight hundred twenty-five thousand, five hundred sixty-one".