1420689 has 8 divisors (see below), whose sum is σ = 1945600. Its totient is φ = 921456.

The previous prime is 1420667. The next prime is 1420697. The reversal of 1420689 is 9860241.

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

It is not a de Polignac number, because 1420689 - 2⁷ = 1420561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420789) 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, 6289 + ... + 6510.

It is an arithmetic number, because the mean of its divisors is an integer number (243200).

2^1420689 is an apocalyptic number.

It is an amenable number.

1420689 is a deficient number, since it is larger than the sum of its proper divisors (524911).

1420689 is a wasteful number, since it uses less digits than its factorization.

1420689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12839.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1420689 is about 1191.9265916993. The cubic root of 1420689 is about 112.4172626231.

The spelling of 1420689 in words is "one million, four hundred twenty thousand, six hundred eighty-nine".