1766121 has 16 divisors (see below), whose sum is σ = 2765184. Its totient is φ = 981504.

The previous prime is 1766117. The next prime is 1766123. The reversal of 1766121 is 1216671.

It is not a de Polignac number, because 1766121 - 2² = 1766117 is a prime.

1766121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1766091 and 1766100.

It is not an unprimeable number, because it can be changed into a prime (1766123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360 + ... + 1913.

It is an arithmetic number, because the mean of its divisors is an integer number (172824).

2^1766121 is an apocalyptic number.

It is an amenable number.

1766121 is a deficient number, since it is larger than the sum of its proper divisors (999063).

1766121 is a wasteful number, since it uses less digits than its factorization.

1766121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320.

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

The square root of 1766121 is about 1328.9548525063. The cubic root of 1766121 is about 120.8760199032.

It can be divided in two parts, 17661 and 21, that multiplied together give a square (370881 = 609²).

The spelling of 1766121 in words is "one million, seven hundred sixty-six thousand, one hundred twenty-one".