1445491 has 4 divisors (see below), whose sum is σ = 1449112. Its totient is φ = 1441872.

The previous prime is 1445467. The next prime is 1445497. The reversal of 1445491 is 1945441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1945441 = 421 ⋅4621.

It is a cyclic number.

It is not a de Polignac number, because 1445491 - 2⁹ = 1444979 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1125 + ... + 2038.

It is an arithmetic number, because the mean of its divisors is an integer number (362278).

2^1445491 is an apocalyptic number.

1445491 is a deficient number, since it is larger than the sum of its proper divisors (3621).

1445491 is an equidigital number, since it uses as much as digits as its factorization.

1445491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620.

The product of its digits is 2880, while the sum is 28.

The square root of 1445491 is about 1202.2857397474. The cubic root of 1445491 is about 113.0676755443.

It can be divided in two parts, 1445 and 491, that added together give a square (1936 = 44²).

The spelling of 1445491 in words is "one million, four hundred forty-five thousand, four hundred ninety-one".