1355042321 has 8 divisors (see below), whose sum is σ = 1379021760. Its totient is φ = 1331096752.

The previous prime is 1355042317. The next prime is 1355042327. The reversal of 1355042321 is 1232405531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1355042321 - 2² = 1355042317 is a prime.

It is a super-2 number, since 2×1355042321² = 3672279383402134082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355042327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80396 + ... + 95778.

It is an arithmetic number, because the mean of its divisors is an integer number (172377720).

Almost surely, 2^1355042321 is an apocalyptic number.

It is an amenable number.

1355042321 is a deficient number, since it is larger than the sum of its proper divisors (23979439).

1355042321 is a wasteful number, since it uses less digits than its factorization.

1355042321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16935.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1355042321 is about 36810.8994864293. The cubic root of 1355042321 is about 1106.5837451276.

Adding to 1355042321 its reverse (1232405531), we get a palindrome (2587447852).

The spelling of 1355042321 in words is "one billion, three hundred fifty-five million, forty-two thousand, three hundred twenty-one".