1041721 has 4 divisors (see below), whose sum is σ = 1046500. Its totient is φ = 1036944.

The previous prime is 1041701. The next prime is 1041731. The reversal of 1041721 is 1271401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 881721 + 160000 = 939^2 + 400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1041721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1041695 and 1041704.

It is not an unprimeable number, because it can be changed into a prime (1041701) 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, 2046 + ... + 2503.

It is an arithmetic number, because the mean of its divisors is an integer number (261625).

2^1041721 is an apocalyptic number.

It is an amenable number.

1041721 is a deficient number, since it is larger than the sum of its proper divisors (4779).

1041721 is an equidigital number, since it uses as much as digits as its factorization.

1041721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 1041721 is about 1020.6473436011. The cubic root of 1041721 is about 101.3717957159.

The spelling of 1041721 in words is "one million, forty-one thousand, seven hundred twenty-one".