1225819481 has 4 divisors (see below), whose sum is σ = 1231629264. Its totient is φ = 1220009700.

The previous prime is 1225819403. The next prime is 1225819547. The reversal of 1225819481 is 1849185221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1225819481 - 2¹⁴ = 1225803097 is a prime.

It is a super-2 number, since 2×1225819481² = 3005266799998218722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225819781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2904575 + ... + 2904996.

It is an arithmetic number, because the mean of its divisors is an integer number (307907316).

Almost surely, 2^1225819481 is an apocalyptic number.

It is an amenable number.

1225819481 is a deficient number, since it is larger than the sum of its proper divisors (5809783).

1225819481 is an equidigital number, since it uses as much as digits as its factorization.

1225819481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5809782.

The product of its digits is 46080, while the sum is 41.

The square root of 1225819481 is about 35011.7049142140. The cubic root of 1225819481 is about 1070.2260217786.

The spelling of 1225819481 in words is "one billion, two hundred twenty-five million, eight hundred nineteen thousand, four hundred eighty-one".