1340869 has 4 divisors (see below), whose sum is σ = 1372096. Its totient is φ = 1309644.

The previous prime is 1340861. The next prime is 1340879. The reversal of 1340869 is 9680431.

1340869 is nontrivially palindromic in base 2 and base 8.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1340869 - 2³ = 1340861 is a prime.

It is a super-2 number, since 2×1340869² = 3595859350322, which contains 22 as substring.

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 1340869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340861) 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, 15549 + ... + 15634.

It is an arithmetic number, because the mean of its divisors is an integer number (343024).

2^1340869 is an apocalyptic number.

It is an amenable number.

1340869 is a deficient number, since it is larger than the sum of its proper divisors (31227).

1340869 is an equidigital number, since it uses as much as digits as its factorization.

1340869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31226.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1340869 is about 1157.9589802752. The cubic root of 1340869 is about 110.2712040773.

It can be divided in two parts, 1340 and 869, that added together give a square (2209 = 47²).

The spelling of 1340869 in words is "one million, three hundred forty thousand, eight hundred sixty-nine".