1367581 has 2 divisors, whose sum is σ = 1367582. Its totient is φ = 1367580.

The previous prime is 1367579. The next prime is 1367593. The reversal of 1367581 is 1857631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 864900 + 502681 = 930^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 1367581 - 2¹ = 1367579 is a prime.

It is a super-2 number, since 2×1367581² = 3740555583122, which contains 22 as substring.

Together with 1367579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1367501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683790 + 683791.

It is an arithmetic number, because the mean of its divisors is an integer number (683791).

2^1367581 is an apocalyptic number.

It is an amenable number.

1367581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1367581 is an equidigital number, since it uses as much as digits as its factorization.

1367581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 1367581 is about 1169.4361889389. The cubic root of 1367581 is about 110.9986472795.

The spelling of 1367581 in words is "one million, three hundred sixty-seven thousand, five hundred eighty-one".