1491073 has 4 divisors (see below), whose sum is σ = 1494448. Its totient is φ = 1487700.

The previous prime is 1491041. The next prime is 1491079. The reversal of 1491073 is 3701941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3701941 = 19 ⋅194839.

It is a cyclic number.

It is not a de Polignac number, because 1491073 - 2⁵ = 1491041 is a prime.

It is an Ulam number.

It is a Duffinian number.

1491073 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1491079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903 + ... + 1948.

It is an arithmetic number, because the mean of its divisors is an integer number (373612).

2^1491073 is an apocalyptic number.

It is an amenable number.

1491073 is a deficient number, since it is larger than the sum of its proper divisors (3375).

1491073 is an equidigital number, since it uses as much as digits as its factorization.

1491073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3374.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1491073 is about 1221.0950003992. The cubic root of 1491073 is about 114.2438864044.

The spelling of 1491073 in words is "one million, four hundred ninety-one thousand, seventy-three".