1226708651 has 4 divisors (see below), whose sum is σ = 1401952752. Its totient is φ = 1051464552.

The previous prime is 1226708629. The next prime is 1226708663. The reversal of 1226708651 is 1568076221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1226708651 is a prime.

It is a super-2 number, since 2×1226708651² = 3009628228876479602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226708051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87622040 + ... + 87622053.

It is an arithmetic number, because the mean of its divisors is an integer number (350488188).

Almost surely, 2^1226708651 is an apocalyptic number.

1226708651 is a deficient number, since it is larger than the sum of its proper divisors (175244101).

1226708651 is an equidigital number, since it uses as much as digits as its factorization.

1226708651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175244100.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1226708651 is about 35024.4007943034. The cubic root of 1226708651 is about 1070.4847284069.

The spelling of 1226708651 in words is "one billion, two hundred twenty-six million, seven hundred eight thousand, six hundred fifty-one".