1491520 has 56 divisors (see below), whose sum is σ = 3657600. Its totient is φ = 579072.

The previous prime is 1491517. The next prime is 1491521. The reversal of 1491520 is 251941.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 1491491 and 1491500.

It is not an unprimeable number, because it can be changed into a prime (1491521) 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 7 ways as a sum of consecutive naturals, for example, 18841 + ... + 18919.

2^1491520 is an apocalyptic number.

1491520 is a gapful number since it is divisible by the number (10) 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 1491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828800).

1491520 is an abundant number, since it is smaller than the sum of its proper divisors (2166080).

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

1491520 is an equidigital number, since it uses as much as digits as its factorization.

1491520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1491520 is about 1221.2780191259. The cubic root of 1491520 is about 114.2553014313.

The spelling of 1491520 in words is "one million, four hundred ninety-one thousand, five hundred twenty".