1491280 has 40 divisors (see below), whose sum is σ = 3964032. Its totient is φ = 511104.

The previous prime is 1491271. The next prime is 1491299. The reversal of 1491280 is 821941.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772 + ... + 1891.

2^1491280 is an apocalyptic number.

1491280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491280 is an abundant number, since it is smaller than the sum of its proper divisors (2472752).

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

1491280 is a wasteful number, since it uses less digits than its factorization.

1491280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683 (or 2677 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1491280 is about 1221.1797574477. The cubic root of 1491280 is about 114.2491728414.

It can be divided in two parts, 1491 and 280, that added together give a palindrome (1771).

The spelling of 1491280 in words is "one million, four hundred ninety-one thousand, two hundred eighty".