1491841 has 4 divisors (see below), whose sum is σ = 1606612. Its totient is φ = 1377072.

The previous prime is 1491839. The next prime is 1491851. The reversal of 1491841 is 1481941.

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 531441 + 960400 = 729^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1491841 - 2¹ = 1491839 is a prime.

It is a Duffinian number.

1491841 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1491821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57366 + ... + 57391.

It is an arithmetic number, because the mean of its divisors is an integer number (401653).

2^1491841 is an apocalyptic number.

It is an amenable number.

1491841 is a deficient number, since it is larger than the sum of its proper divisors (114771).

1491841 is a wasteful number, since it uses less digits than its factorization.

1491841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114770.

The product of its digits is 1152, while the sum is 28.

The square root of 1491841 is about 1221.4094317632. The cubic root of 1491841 is about 114.2634973927.

It can be divided in two parts, 1491 and 841, that added together give a palindrome (2332).

The spelling of 1491841 in words is "one million, four hundred ninety-one thousand, eight hundred forty-one".