1491185 has 4 divisors (see below), whose sum is σ = 1789428. Its totient is φ = 1192944.

The previous prime is 1491179. The next prime is 1491199. The reversal of 1491185 is 5811941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5811941 = 1229 ⋅4729.

It can be written as a sum of positive squares in 2 ways, for example, as 1168561 + 322624 = 1081^2 + 568^2 .

It is a cyclic number.

It is not a de Polignac number, because 1491185 - 2¹⁰ = 1490161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149114 + ... + 149123.

It is an arithmetic number, because the mean of its divisors is an integer number (447357).

2^1491185 is an apocalyptic number.

It is an amenable number.

1491185 is a deficient number, since it is larger than the sum of its proper divisors (298243).

1491185 is an equidigital number, since it uses as much as digits as its factorization.

1491185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298242.

The product of its digits is 1440, while the sum is 29.

The square root of 1491185 is about 1221.1408600157. The cubic root of 1491185 is about 114.2467467596.

The spelling of 1491185 in words is "one million, four hundred ninety-one thousand, one hundred eighty-five".