1397086 has 4 divisors (see below), whose sum is σ = 2095632. Its totient is φ = 698542.

The previous prime is 1397069. The next prime is 1397087. The reversal of 1397086 is 6807931.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397087) by changing a digit.

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, 349270 + ... + 349273.

It is an arithmetic number, because the mean of its divisors is an integer number (523908).

2^1397086 is an apocalyptic number.

1397086 is a deficient number, since it is larger than the sum of its proper divisors (698546).

1397086 is an equidigital number, since it uses as much as digits as its factorization.

1397086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698545.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1397086 is about 1181.9839254406. The cubic root of 1397086 is about 111.7912245910.

It can be divided in two parts, 139 and 7086, that added together give a square (7225 = 85²).

The spelling of 1397086 in words is "one million, three hundred ninety-seven thousand, eighty-six".