1491279 has 4 divisors (see below), whose sum is σ = 1988376. Its totient is φ = 994184.

The previous prime is 1491271. The next prime is 1491299. The reversal of 1491279 is 9721941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1491279 - 2³ = 1491271 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491271) 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, 248544 + ... + 248549.

It is an arithmetic number, because the mean of its divisors is an integer number (497094).

2^1491279 is an apocalyptic number.

1491279 is a deficient number, since it is larger than the sum of its proper divisors (497097).

1491279 is an equidigital number, since it uses as much as digits as its factorization.

1491279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497096.

The product of its digits is 4536, while the sum is 33.

The square root of 1491279 is about 1221.1793480075. The cubic root of 1491279 is about 114.2491473042.

It can be divided in two parts, 1491 and 279, that added together give a triangular number (1770 = T₅₉).

The spelling of 1491279 in words is "one million, four hundred ninety-one thousand, two hundred seventy-nine".