1439397 has 16 divisors (see below), whose sum is σ = 2160000. Its totient is φ = 947232.

The previous prime is 1439393. The next prime is 1439401. The reversal of 1439397 is 7939341.

It is an interprime number because it is at equal distance from previous prime (1439393) and next prime (1439401).

It is not a de Polignac number, because 1439397 - 2² = 1439393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1439393) 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 15 ways as a sum of consecutive naturals, for example, 2104 + ... + 2702.

It is an arithmetic number, because the mean of its divisors is an integer number (135000).

2^1439397 is an apocalyptic number.

It is an amenable number.

1439397 is a deficient number, since it is larger than the sum of its proper divisors (720603).

1439397 is an equidigital number, since it uses as much as digits as its factorization.

1439397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 691 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 1439397 is about 1199.7487236918. The cubic root of 1439397 is about 112.9085589116.

The spelling of 1439397 in words is "one million, four hundred thirty-nine thousand, three hundred ninety-seven".