1225636099 has 4 divisors (see below), whose sum is σ = 1241150560. Its totient is φ = 1210121640.

The previous prime is 1225636079. The next prime is 1225636109. The reversal of 1225636099 is 9906365221.

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 1225636099 - 2⁵ = 1225636067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225636079) 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 3 ways as a sum of consecutive naturals, for example, 7757112 + ... + 7757269.

It is an arithmetic number, because the mean of its divisors is an integer number (310287640).

Almost surely, 2^1225636099 is an apocalyptic number.

1225636099 is a deficient number, since it is larger than the sum of its proper divisors (15514461).

1225636099 is an equidigital number, since it uses as much as digits as its factorization.

1225636099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15514460.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 1225636099 is about 35009.0859492218. The cubic root of 1225636099 is about 1070.1726506857.

The spelling of 1225636099 in words is "one billion, two hundred twenty-five million, six hundred thirty-six thousand, ninety-nine".