1406439 has 18 divisors (see below), whose sum is σ = 2127008. Its totient is φ = 894600.

The previous prime is 1406429. The next prime is 1406441. The reversal of 1406439 is 9346041.

1406439 is a `hidden beast` number, since 14 + 0 + 643 + 9 = 666.

It is not a de Polignac number, because 1406439 - 2⁷ = 1406311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406429) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19774 + ... + 19844.

2^1406439 is an apocalyptic number.

1406439 is a deficient number, since it is larger than the sum of its proper divisors (720569).

1406439 is an equidigital number, since it uses as much as digits as its factorization.

1406439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1406439 is about 1185.9338092828. The cubic root of 1406439 is about 112.0401376124.

The spelling of 1406439 in words is "one million, four hundred six thousand, four hundred thirty-nine".