1489891 has 8 divisors (see below), whose sum is σ = 1656704. Its totient is φ = 1330560.

The previous prime is 1489889. The next prime is 1489903. The reversal of 1489891 is 1989841.

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

It is a cyclic number.

It is not a de Polignac number, because 1489891 - 2¹ = 1489889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1489841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1446 + ... + 2251.

It is an arithmetic number, because the mean of its divisors is an integer number (207088).

2^1489891 is an apocalyptic number.

1489891 is a deficient number, since it is larger than the sum of its proper divisors (166813).

1489891 is a wasteful number, since it uses less digits than its factorization.

1489891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741.

The product of its digits is 20736, while the sum is 40.

The square root of 1489891 is about 1220.6109126171. The cubic root of 1489891 is about 114.2136907061.

The spelling of 1489891 in words is "one million, four hundred eighty-nine thousand, eight hundred ninety-one".