1239797 has 4 divisors (see below), whose sum is σ = 1335180. Its totient is φ = 1144416.

The previous prime is 1239773. The next prime is 1239803. The reversal of 1239797 is 7979321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 128881 + 1110916 = 359^2 + 1054^2 .

It is not a de Polignac number, because 1239797 - 2¹² = 1235701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1239797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239727) 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, 47672 + ... + 47697.

It is an arithmetic number, because the mean of its divisors is an integer number (333795).

2^1239797 is an apocalyptic number.

It is an amenable number.

1239797 is a deficient number, since it is larger than the sum of its proper divisors (95383).

1239797 is an equidigital number, since it uses as much as digits as its factorization.

1239797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95382.

The product of its digits is 23814, while the sum is 38.

The square root of 1239797 is about 1113.4617191444. The cubic root of 1239797 is about 107.4278441331.

The spelling of 1239797 in words is "one million, two hundred thirty-nine thousand, seven hundred ninety-seven".