1355134221 has 24 divisors (see below), whose sum is σ = 2284648704. Its totient is φ = 757884960.

The previous prime is 1355134219. The next prime is 1355134223. The reversal of 1355134221 is 1224315531.

It is an interprime number because it is at equal distance from previous prime (1355134219) and next prime (1355134223).

It is not a de Polignac number, because 1355134221 - 2¹ = 1355134219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355134223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225870 + ... + 231791.

It is an arithmetic number, because the mean of its divisors is an integer number (95193696).

Almost surely, 2^1355134221 is an apocalyptic number.

It is an amenable number.

1355134221 is a deficient number, since it is larger than the sum of its proper divisors (929514483).

1355134221 is a wasteful number, since it uses less digits than its factorization.

1355134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457721 (or 457718 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1355134221 is about 36812.1477368545. The cubic root of 1355134221 is about 1106.6087610123.

Adding to 1355134221 its reverse (1224315531), we get a palindrome (2579449752).

The spelling of 1355134221 in words is "one billion, three hundred fifty-five million, one hundred thirty-four thousand, two hundred twenty-one".