1336561 has 2 divisors, whose sum is σ = 1336562. Its totient is φ = 1336560.

The previous prime is 1336547. The next prime is 1336567. The reversal of 1336561 is 1656331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1336336 + 225 = 1156^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 1336561 - 2⁵ = 1336529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1336567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668280 + 668281.

It is an arithmetic number, because the mean of its divisors is an integer number (668281).

2^1336561 is an apocalyptic number.

It is an amenable number.

1336561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1336561 is an equidigital number, since it uses as much as digits as its factorization.

1336561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 1336561 is about 1156.0973142431. The cubic root of 1336561 is about 110.1529827326.

The spelling of 1336561 in words is "one million, three hundred thirty-six thousand, five hundred sixty-one".