1791481 has 4 divisors (see below), whose sum is σ = 1811700. Its totient is φ = 1771264.

The previous prime is 1791473. The next prime is 1791487. The reversal of 1791481 is 1841971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1841971 = 37 ⋅49783.

It can be written as a sum of positive squares in 2 ways, for example, as 1010025 + 781456 = 1005^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 1791481 - 2³ = 1791473 is a prime.

It is a super-2 number, since 2×1791481² = 6418808346722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1791487) 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, 9976 + ... + 10153.

It is an arithmetic number, because the mean of its divisors is an integer number (452925).

2^1791481 is an apocalyptic number.

It is an amenable number.

1791481 is a deficient number, since it is larger than the sum of its proper divisors (20219).

1791481 is an equidigital number, since it uses as much as digits as its factorization.

1791481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20218.

The product of its digits is 2016, while the sum is 31.

The square root of 1791481 is about 1338.4621772766. The cubic root of 1791481 is about 121.4518316291.

The spelling of 1791481 in words is "one million, seven hundred ninety-one thousand, four hundred eighty-one".