1355040321 has 16 divisors (see below), whose sum is σ = 1830855936. Its totient is φ = 891320976.

The previous prime is 1355040299. The next prime is 1355040389. The reversal of 1355040321 is 1230405531.

It is not a de Polignac number, because 1355040321 - 2¹⁴ = 1355023937 is a prime.

It is a super-2 number, since 2×1355040321² = 3672268543071566082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1355040291 and 1355040300.

It is not an unprimeable number, because it can be changed into a prime (1355040521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216786 + ... + 222948.

It is an arithmetic number, because the mean of its divisors is an integer number (114428496).

Almost surely, 2^1355040321 is an apocalyptic number.

It is an amenable number.

1355040321 is a deficient number, since it is larger than the sum of its proper divisors (475815615).

1355040321 is an equidigital number, since it uses as much as digits as its factorization.

1355040321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7132.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1355040321 is about 36810.8723205523. The cubic root of 1355040321 is about 1106.5832006997.

Adding to 1355040321 its reverse (1230405531), we get a palindrome (2585445852).

The spelling of 1355040321 in words is "one billion, three hundred fifty-five million, forty thousand, three hundred twenty-one".