1439897 has 4 divisors (see below), whose sum is σ = 1461456. Its totient is φ = 1418340.

The previous prime is 1439891. The next prime is 1439903. The reversal of 1439897 is 7989341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1439891) and next prime (1439903).

It is a cyclic number.

It is not a de Polignac number, because 1439897 - 2⁴ = 1439881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1439891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10679 + ... + 10812.

It is an arithmetic number, because the mean of its divisors is an integer number (365364).

2^1439897 is an apocalyptic number.

It is an amenable number.

1439897 is a deficient number, since it is larger than the sum of its proper divisors (21559).

1439897 is an equidigital number, since it uses as much as digits as its factorization.

1439897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21558.

The product of its digits is 54432, while the sum is 41.

The square root of 1439897 is about 1199.9570825659. The cubic root of 1439897 is about 112.9216309929.

The spelling of 1439897 in words is "one million, four hundred thirty-nine thousand, eight hundred ninety-seven".