1399966 has 8 divisors (see below), whose sum is σ = 2105064. Its totient is φ = 698280.

The previous prime is 1399963. The next prime is 1399999. The reversal of 1399966 is 6699931.

It is a sphenic number, since it is the product of 3 distinct primes.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876 + ... + 1888.

It is an arithmetic number, because the mean of its divisors is an integer number (263133).

2^1399966 is an apocalyptic number.

1399966 is a deficient number, since it is larger than the sum of its proper divisors (705098).

1399966 is a wasteful number, since it uses less digits than its factorization.

1399966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706.

The product of its digits is 78732, while the sum is 43.

The square root of 1399966 is about 1183.2015889104. The cubic root of 1399966 is about 111.8679885955.

The spelling of 1399966 in words is "one million, three hundred ninety-nine thousand, nine hundred sixty-six".