1226155499 has 2 divisors, whose sum is σ = 1226155500. Its totient is φ = 1226155498.

The previous prime is 1226155487. The next prime is 1226155529. The reversal of 1226155499 is 9945516221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1226155499 - 2¹² = 1226151403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1226155459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613077749 + 613077750.

It is an arithmetic number, because the mean of its divisors is an integer number (613077750).

Almost surely, 2^1226155499 is an apocalyptic number.

1226155499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226155499 is an equidigital number, since it uses as much as digits as its factorization.

1226155499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 44.

The square root of 1226155499 is about 35016.5032377592. The cubic root of 1226155499 is about 1070.3238019056.

The spelling of 1226155499 in words is "one billion, two hundred twenty-six million, one hundred fifty-five thousand, four hundred ninety-nine".