1491264 has 56 divisors (see below), whose sum is σ = 4389120. Its totient is φ = 496512.

The previous prime is 1491247. The next prime is 1491271. The reversal of 1491264 is 4621941.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1297 + ... + 2159.

2^1491264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2194560).

1491264 is an abundant number, since it is smaller than the sum of its proper divisors (2897856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1491264 is an equidigital number, since it uses as much as digits as its factorization.

1491264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884 (or 868 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1491264 is about 1221.1732063880. The cubic root of 1491264 is about 114.2487642453.

The spelling of 1491264 in words is "one million, four hundred ninety-one thousand, two hundred sixty-four".