1226812769 has 32 divisors (see below), whose sum is σ = 1606187520. Its totient is φ = 909315072.

The previous prime is 1226812759. The next prime is 1226812777. The reversal of 1226812769 is 9672186221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1226812769 - 2¹² = 1226808673 is a prime.

It is a super-2 number, since 2×1226812769² = 3010139140362894722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1226812759) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 352532 + ... + 355994.

It is an arithmetic number, because the mean of its divisors is an integer number (50193360).

Almost surely, 2^1226812769 is an apocalyptic number.

It is an amenable number.

1226812769 is a deficient number, since it is larger than the sum of its proper divisors (379374751).

1226812769 is a wasteful number, since it uses less digits than its factorization.

1226812769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729.

The product of its digits is 145152, while the sum is 44.

The square root of 1226812769 is about 35025.8871265240. The cubic root of 1226812769 is about 1070.5150136681.

The spelling of 1226812769 in words is "one billion, two hundred twenty-six million, eight hundred twelve thousand, seven hundred sixty-nine".