1228956135 has 32 divisors (see below), whose sum is σ = 2181461760. Its totient is φ = 585753600.

The previous prime is 1228956133. The next prime is 1228956151. The reversal of 1228956135 is 5316598221.

It is not a de Polignac number, because 1228956135 - 2¹ = 1228956133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228956133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53386 + ... + 72855.

It is an arithmetic number, because the mean of its divisors is an integer number (68170680).

Almost surely, 2^1228956135 is an apocalyptic number.

1228956135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1228956135 is a deficient number, since it is larger than the sum of its proper divisors (952505625).

1228956135 is a wasteful number, since it uses less digits than its factorization.

1228956135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126319.

The product of its digits is 129600, while the sum is 42.

The square root of 1228956135 is about 35056.4706580682. The cubic root of 1228956135 is about 1071.1380836241.

The spelling of 1228956135 in words is "one billion, two hundred twenty-eight million, nine hundred fifty-six thousand, one hundred thirty-five".