1491136 has 28 divisors (see below), whose sum is σ = 3090672. Its totient is φ = 712448.

The previous prime is 1491109. The next prime is 1491157. The reversal of 1491136 is 6311941.

It is a self number, because there is not a number n which added to its sum of digits gives 1491136.

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 3 ways as a sum of consecutive naturals, for example, 966 + ... + 1978.

2^1491136 is an apocalyptic number.

1491136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1545336).

1491136 is an abundant number, since it is smaller than the sum of its proper divisors (1599536).

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

1491136 is a wasteful number, since it uses less digits than its factorization.

1491136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1038 counting only the distinct ones).

The product of its digits is 648, while the sum is 25.

The square root of 1491136 is about 1221.1207966454. The cubic root of 1491136 is about 114.2454953718.

The spelling of 1491136 in words is "one million, four hundred ninety-one thousand, one hundred thirty-six".