1226721364 has 48 divisors (see below), whose sum is σ = 2379706560. Its totient is φ = 548674560.

The previous prime is 1226721361. The next prime is 1226721383. The reversal of 1226721364 is 4631276221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226721361) 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, 840067 + ... + 841525.

It is an arithmetic number, because the mean of its divisors is an integer number (49577220).

Almost surely, 2^1226721364 is an apocalyptic number.

It is an amenable number.

1226721364 is a deficient number, since it is larger than the sum of its proper divisors (1152985196).

1226721364 is a wasteful number, since it uses less digits than its factorization.

1226721364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768 (or 1766 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 1226721364 is about 35024.5822815919. The cubic root of 1226721364 is about 1070.4884263851.

Adding to 1226721364 its reverse (4631276221), we get a palindrome (5857997585).

The spelling of 1226721364 in words is "one billion, two hundred twenty-six million, seven hundred twenty-one thousand, three hundred sixty-four".