1353581 has 2 divisors, whose sum is σ = 1353582. Its totient is φ = 1353580.

The previous prime is 1353551. The next prime is 1353593. The reversal of 1353581 is 1853531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1060900 + 292681 = 1030^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 1353581 - 2¹⁰ = 1352557 is a prime.

It is a super-2 number, since 2×1353581² = 3664363047122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1353581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1353551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676790 + 676791.

It is an arithmetic number, because the mean of its divisors is an integer number (676791).

2^1353581 is an apocalyptic number.

It is an amenable number.

1353581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1353581 is an equidigital number, since it uses as much as digits as its factorization.

1353581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

The square root of 1353581 is about 1163.4350003331. The cubic root of 1353581 is about 110.6185810271.

The spelling of 1353581 in words is "one million, three hundred fifty-three thousand, five hundred eighty-one".