1225854869 has 2 divisors, whose sum is σ = 1225854870. Its totient is φ = 1225854868.

The previous prime is 1225854857. The next prime is 1225854907. The reversal of 1225854869 is 9684585221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1190595025 + 35259844 = 34505^2 + 5938^2 .

It is an emirp because it is prime and its reverse (9684585221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225854869 - 2¹⁶ = 1225789333 is a prime.

It is a super-2 number, since 2×1225854869² = 3005440319702014322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225854569) 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 as a sum of consecutive naturals, namely, 612927434 + 612927435.

It is an arithmetic number, because the mean of its divisors is an integer number (612927435).

Almost surely, 2^1225854869 is an apocalyptic number.

It is an amenable number.

1225854869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225854869 is an equidigital number, since it uses as much as digits as its factorization.

1225854869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 50.

The square root of 1225854869 is about 35012.2102844136. The cubic root of 1225854869 is about 1070.2363204113.

The spelling of 1225854869 in words is "one billion, two hundred twenty-five million, eight hundred fifty-four thousand, eight hundred sixty-nine".