1355332261 has 2 divisors, whose sum is σ = 1355332262. Its totient is φ = 1355332260.

The previous prime is 1355332193. The next prime is 1355332267. The reversal of 1355332261 is 1622335531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 922276161 + 433056100 = 30369^2 + 20810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355332261 - 2¹¹ = 1355330213 is a prime.

It is a super-3 number, since 3×1355332261³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355332267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677666130 + 677666131.

It is an arithmetic number, because the mean of its divisors is an integer number (677666131).

Almost surely, 2^1355332261 is an apocalyptic number.

It is an amenable number.

1355332261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355332261 is an equidigital number, since it uses as much as digits as its factorization.

1355332261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 31.

The square root of 1355332261 is about 36814.8375115252. The cubic root of 1355332261 is about 1106.6626651744.

Adding to 1355332261 its reverse (1622335531), we get a palindrome (2977667792).

The spelling of 1355332261 in words is "one billion, three hundred fifty-five million, three hundred thirty-two thousand, two hundred sixty-one".