1213225276 has 24 divisors (see below), whose sum is σ = 2151515520. Its totient is φ = 598525872.

The previous prime is 1213225267. The next prime is 1213225303. The reversal of 1213225276 is 6725223121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319155 + ... + 322933.

It is an arithmetic number, because the mean of its divisors is an integer number (89646480).

Almost surely, 2^1213225276 is an apocalyptic number.

It is an amenable number.

1213225276 is a deficient number, since it is larger than the sum of its proper divisors (938290244).

1213225276 is a wasteful number, since it uses less digits than its factorization.

1213225276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4833 (or 4831 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 1213225276 is about 34831.3834924770. The cubic root of 1213225276 is about 1066.5481905304.

Adding to 1213225276 its reverse (6725223121), we get a palindrome (7938448397).

The spelling of 1213225276 in words is "one billion, two hundred thirteen million, two hundred twenty-five thousand, two hundred seventy-six".