1397966 has 4 divisors (see below), whose sum is σ = 2096952. Its totient is φ = 698982.

The previous prime is 1397959. The next prime is 1397983. The reversal of 1397966 is 6697931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6697931 = 509 ⋅13159.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349490 + ... + 349493.

It is an arithmetic number, because the mean of its divisors is an integer number (524238).

2^1397966 is an apocalyptic number.

1397966 is a deficient number, since it is larger than the sum of its proper divisors (698986).

1397966 is an equidigital number, since it uses as much as digits as its factorization.

1397966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698985.

The product of its digits is 61236, while the sum is 41.

The square root of 1397966 is about 1182.3561223252. The cubic root of 1397966 is about 111.8146914427.

It can be divided in two parts, 13 and 97966, that added together give a palindrome (97979).

The spelling of 1397966 in words is "one million, three hundred ninety-seven thousand, nine hundred sixty-six".