1290697 has 4 divisors (see below), whose sum is σ = 1299076. Its totient is φ = 1282320.

The previous prime is 1290683. The next prime is 1290719. The reversal of 1290697 is 7960921.

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 853776 + 436921 = 924^2 + 661^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290697 - 2¹¹ = 1288649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1290607) 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 in 3 ways as a sum of consecutive naturals, for example, 3954 + ... + 4267.

It is an arithmetic number, because the mean of its divisors is an integer number (324769).

2^1290697 is an apocalyptic number.

It is an amenable number.

1290697 is a deficient number, since it is larger than the sum of its proper divisors (8379).

1290697 is an equidigital number, since it uses as much as digits as its factorization.

1290697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8378.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1290697 is about 1136.0884648653. The cubic root of 1290697 is about 108.8783256370.

It can be divided in two parts, 12 and 90697, that added together give a palindrome (90709).

The spelling of 1290697 in words is "one million, two hundred ninety thousand, six hundred ninety-seven".