1155630326 has 4 divisors (see below), whose sum is σ = 1733445492. Its totient is φ = 577815162.

The previous prime is 1155630323. The next prime is 1155630337. The reversal of 1155630326 is 6230365511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6230365511 = 23 ⋅270885457.

It is a junction number, because it is equal to n+sod(n) for n = 1155630292 and 1155630301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155630323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288907580 + ... + 288907583.

It is an arithmetic number, because the mean of its divisors is an integer number (433361373).

Almost surely, 2^1155630326 is an apocalyptic number.

1155630326 is a deficient number, since it is larger than the sum of its proper divisors (577815166).

1155630326 is an equidigital number, since it uses as much as digits as its factorization.

1155630326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577815165.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 1155630326 is about 33994.5631829562. The cubic root of 1155630326 is about 1049.3965772471.

Adding to 1155630326 its reverse (6230365511), we get a palindrome (7385995837).

The spelling of 1155630326 in words is "one billion, one hundred fifty-five million, six hundred thirty thousand, three hundred twenty-six".