1367661 has 8 divisors (see below), whose sum is σ = 1828960. Its totient is φ = 909072.

The previous prime is 1367647. The next prime is 1367687. The reversal of 1367661 is 1667631.

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

It is not a de Polignac number, because 1367661 - 2⁷ = 1367533 is a prime.

It is a super-2 number, since 2×1367661² = 3740993221842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1367161) 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 7 ways as a sum of consecutive naturals, for example, 1575 + ... + 2283.

It is an arithmetic number, because the mean of its divisors is an integer number (228620).

2^1367661 is an apocalyptic number.

It is an amenable number.

1367661 is a deficient number, since it is larger than the sum of its proper divisors (461299).

1367661 is an equidigital number, since it uses as much as digits as its factorization.

1367661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355.

The product of its digits is 4536, while the sum is 30.

The square root of 1367661 is about 1169.4703929557. The cubic root of 1367661 is about 111.0008116165. Note that the first 3 decimals are identical.

Subtracting from 1367661 its sum of digits (30), we obtain a palindrome (1367631).

The spelling of 1367661 in words is "one million, three hundred sixty-seven thousand, six hundred sixty-one".