1399967 has 4 divisors (see below), whose sum is σ = 1482336. Its totient is φ = 1317600.

The previous prime is 1399963. The next prime is 1399999. The reversal of 1399967 is 7699931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1399967 - 2² = 1399963 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 (1399963) 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 3 ways as a sum of consecutive naturals, for example, 41159 + ... + 41192.

It is an arithmetic number, because the mean of its divisors is an integer number (370584).

2^1399967 is an apocalyptic number.

1399967 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1399967 is a deficient number, since it is larger than the sum of its proper divisors (82369).

1399967 is an equidigital number, since it uses as much as digits as its factorization.

1399967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82368.

The product of its digits is 91854, while the sum is 44.

The square root of 1399967 is about 1183.2020114925. The cubic root of 1399967 is about 111.8680152314.

The spelling of 1399967 in words is "one million, three hundred ninety-nine thousand, nine hundred sixty-seven".