1661127 has 16 divisors (see below), whose sum is σ = 2408448. Its totient is φ = 1012320.

The previous prime is 1661123. The next prime is 1661137. The reversal of 1661127 is 7211661.

It is not a de Polignac number, because 1661127 - 2² = 1661123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1661097 and 1661106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7338 + ... + 7560.

It is an arithmetic number, because the mean of its divisors is an integer number (150528).

2^1661127 is an apocalyptic number.

1661127 is a deficient number, since it is larger than the sum of its proper divisors (747321).

1661127 is a wasteful number, since it uses less digits than its factorization.

1661127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430.

The product of its digits is 504, while the sum is 24.

The square root of 1661127 is about 1288.8471592862. The cubic root of 1661127 is about 118.4316043203.

Adding to 1661127 its reverse (7211661), we get a palindrome (8872788).

The spelling of 1661127 in words is "one million, six hundred sixty-one thousand, one hundred twenty-seven".