1155321402 has 8 divisors (see below), whose sum is σ = 2310642816. Its totient is φ = 385107132.

The previous prime is 1155321383. The next prime is 1155321403. The reversal of 1155321402 is 2041235511.

It is a happy number.

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

1155321402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1155321403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96276778 + ... + 96276789.

It is an arithmetic number, because the mean of its divisors is an integer number (288830352).

Almost surely, 2^1155321402 is an apocalyptic number.

1155321402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155321402 is a wasteful number, since it uses less digits than its factorization.

1155321402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192553572.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1155321402 is about 33990.0191526866. The cubic root of 1155321402 is about 1049.3030604098.

Adding to 1155321402 its reverse (2041235511), we get a palindrome (3196556913).

The spelling of 1155321402 in words is "one billion, one hundred fifty-five million, three hundred twenty-one thousand, four hundred two".