1642489 has 8 divisors (see below), whose sum is σ = 1762560. Its totient is φ = 1525056.

The previous prime is 1642483. The next prime is 1642513. The reversal of 1642489 is 9842461.

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 1642489 - 2³ = 1642481 is a prime.

1642489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1642481) 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, 732 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (220320).

2^1642489 is an apocalyptic number.

It is an amenable number.

1642489 is a deficient number, since it is larger than the sum of its proper divisors (120071).

1642489 is a wasteful number, since it uses less digits than its factorization.

1642489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319.

The product of its digits is 13824, while the sum is 34.

The square root of 1642489 is about 1281.5962702817. The cubic root of 1642489 is about 117.9869994295.

The spelling of 1642489 in words is "one million, six hundred forty-two thousand, four hundred eighty-nine".