1226225787 has 4 divisors (see below), whose sum is σ = 1634967720. Its totient is φ = 817483856.

The previous prime is 1226225783. The next prime is 1226225789. The reversal of 1226225787 is 7875226221.

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

It is a cyclic number.

It is not a de Polignac number, because 1226225787 - 2² = 1226225783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1226225783) 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, 204370962 + ... + 204370967.

It is an arithmetic number, because the mean of its divisors is an integer number (408741930).

Almost surely, 2^1226225787 is an apocalyptic number.

1226225787 is a deficient number, since it is larger than the sum of its proper divisors (408741933).

1226225787 is an equidigital number, since it uses as much as digits as its factorization.

1226225787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408741932.

The product of its digits is 188160, while the sum is 42.

The square root of 1226225787 is about 35017.5068644243. The cubic root of 1226225787 is about 1070.3442532219.

The spelling of 1226225787 in words is "one billion, two hundred twenty-six million, two hundred twenty-five thousand, seven hundred eighty-seven".