1491487 has 8 divisors (see below), whose sum is σ = 1534896. Its totient is φ = 1448832.

The previous prime is 1491449. The next prime is 1491491. The reversal of 1491487 is 7841941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1491487 is a prime.

It is a Duffinian number.

1491487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491407) 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 7 ways as a sum of consecutive naturals, for example, 7473 + ... + 7669.

It is an arithmetic number, because the mean of its divisors is an integer number (191862).

2^1491487 is an apocalyptic number.

1491487 is a deficient number, since it is larger than the sum of its proper divisors (43409).

1491487 is a wasteful number, since it uses less digits than its factorization.

1491487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377.

The product of its digits is 8064, while the sum is 34.

The square root of 1491487 is about 1221.2645086139. The cubic root of 1491487 is about 114.2544587892.

The spelling of 1491487 in words is "one million, four hundred ninety-one thousand, four hundred eighty-seven".