1355399321 has 8 divisors (see below), whose sum is σ = 1379268864. Its totient is φ = 1331583120.

The previous prime is 1355399317. The next prime is 1355399323. The reversal of 1355399321 is 1239935531.

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 1355399321 - 2² = 1355399317 is a prime.

It is a super-2 number, since 2×1355399321² = 3674214638734522082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355399323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39770 + ... + 65516.

It is an arithmetic number, because the mean of its divisors is an integer number (172408608).

Almost surely, 2^1355399321 is an apocalyptic number.

It is an amenable number.

1355399321 is a deficient number, since it is larger than the sum of its proper divisors (23869543).

1355399321 is an equidigital number, since it uses as much as digits as its factorization.

1355399321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26671.

The product of its digits is 109350, while the sum is 41.

The square root of 1355399321 is about 36815.7482743459. The cubic root of 1355399321 is about 1106.6809169287.

The spelling of 1355399321 in words is "one billion, three hundred fifty-five million, three hundred ninety-nine thousand, three hundred twenty-one".