1491949 has 4 divisors (see below), whose sum is σ = 1528380. Its totient is φ = 1455520.

The previous prime is 1491947. The next prime is 1491953. The reversal of 1491949 is 9491941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9491941 = 1277 ⋅7433.

It can be written as a sum of positive squares in 2 ways, for example, as 777924 + 714025 = 882^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1491949 - 2¹ = 1491947 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 (1491943) 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, 18154 + ... + 18235.

It is an arithmetic number, because the mean of its divisors is an integer number (382095).

2^1491949 is an apocalyptic number.

It is an amenable number.

1491949 is a deficient number, since it is larger than the sum of its proper divisors (36431).

1491949 is an equidigital number, since it uses as much as digits as its factorization.

1491949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36430.

The product of its digits is 11664, while the sum is 37.

The square root of 1491949 is about 1221.4536421821. The cubic root of 1491949 is about 114.2662546481.

The spelling of 1491949 in words is "one million, four hundred ninety-one thousand, nine hundred forty-nine".