1366869 has 8 divisors (see below), whose sum is σ = 2082880. Its totient is φ = 781056.

The previous prime is 1366861. The next prime is 1366877. The reversal of 1366869 is 9686631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1366861) and next prime (1366877).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1366869 - 2³ = 1366861 is a prime.

It is a super-2 number, since 2×1366869² = 3736661726322, which contains 22 as substring.

It is a Duffinian number.

1366869 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32524 + ... + 32565.

It is an arithmetic number, because the mean of its divisors is an integer number (260360).

2^1366869 is an apocalyptic number.

It is an amenable number.

1366869 is a deficient number, since it is larger than the sum of its proper divisors (716011).

1366869 is an equidigital number, since it uses as much as digits as its factorization.

1366869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65099.

The product of its digits is 46656, while the sum is 39.

The square root of 1366869 is about 1169.1317291050. The cubic root of 1366869 is about 110.9793809603.

The spelling of 1366869 in words is "one million, three hundred sixty-six thousand, eight hundred sixty-nine".