1156421216 has 12 divisors (see below), whose sum is σ = 2276704332. Its totient is φ = 578210592.

The previous prime is 1156421213. The next prime is 1156421239. The reversal of 1156421216 is 6121246511.

It is a super-3 number, since 3×1156421216³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156421213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18069050 + ... + 18069113.

It is an arithmetic number, because the mean of its divisors is an integer number (189725361).

Almost surely, 2^1156421216 is an apocalyptic number.

1156421216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1156421216 is a deficient number, since it is larger than the sum of its proper divisors (1120283116).

1156421216 is an equidigital number, since it uses as much as digits as its factorization.

1156421216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36138173 (or 36138165 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 1156421216 is about 34006.1937887791. The cubic root of 1156421216 is about 1049.6359179131.

Adding to 1156421216 its reverse (6121246511), we get a palindrome (7277667727).

The spelling of 1156421216 in words is "one billion, one hundred fifty-six million, four hundred twenty-one thousand, two hundred sixteen".