1406889 has 20 divisors (see below), whose sum is σ = 2294160. Its totient is φ = 852120.

The previous prime is 1406879. The next prime is 1406897. The reversal of 1406889 is 9886041.

It is a happy number.

It is not a de Polignac number, because 1406889 - 2⁵ = 1406857 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1406849) 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 19 ways as a sum of consecutive naturals, for example, 102 + ... + 1680.

It is an arithmetic number, because the mean of its divisors is an integer number (114708).

2^1406889 is an apocalyptic number.

It is an amenable number.

1406889 is a deficient number, since it is larger than the sum of its proper divisors (887271).

1406889 is a wasteful number, since it uses less digits than its factorization.

1406889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602 (or 1593 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1406889 is about 1186.1235180199. The cubic root of 1406889 is about 112.0520856802.

The spelling of 1406889 in words is "one million, four hundred six thousand, eight hundred eighty-nine".