1761121 has 4 divisors (see below), whose sum is σ = 1764544. Its totient is φ = 1757700.

The previous prime is 1761107. The next prime is 1761127. The reversal of 1761121 is 1211671.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1211671 = 463 ⋅2617.

It is a cyclic number.

It is not a de Polignac number, because 1761121 - 2⁹ = 1760609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1761127) 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 3 ways as a sum of consecutive naturals, for example, 765 + ... + 2026.

It is an arithmetic number, because the mean of its divisors is an integer number (441136).

2^1761121 is an apocalyptic number.

It is an amenable number.

1761121 is a deficient number, since it is larger than the sum of its proper divisors (3423).

1761121 is an equidigital number, since it uses as much as digits as its factorization.

1761121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422.

The product of its digits is 84, while the sum is 19.

The square root of 1761121 is about 1327.0723416604. The cubic root of 1761121 is about 120.7618428745.

Adding to 1761121 its reverse (1211671), we get a palindrome (2972792).

The spelling of 1761121 in words is "one million, seven hundred sixty-one thousand, one hundred twenty-one".