1488991 has 8 divisors (see below), whose sum is σ = 1748000. Its totient is φ = 1241568.

The previous prime is 1488989. The next prime is 1489003. The reversal of 1488991 is 1998841.

1488991 = T₂₆₅ + T₂₆₆ + ... + T₃₀₁.

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 1488991 - 2¹ = 1488989 is a prime.

It is a Duffinian number.

1488991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1488901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2616 + ... + 3133.

It is an arithmetic number, because the mean of its divisors is an integer number (218500).

2^1488991 is an apocalyptic number.

1488991 is a deficient number, since it is larger than the sum of its proper divisors (259009).

1488991 is an equidigital number, since it uses as much as digits as its factorization.

1488991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5793.

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

The square root of 1488991 is about 1220.2421890756. The cubic root of 1488991 is about 114.1906883463.

The spelling of 1488991 in words is "one million, four hundred eighty-eight thousand, nine hundred ninety-one".