1225085899 has 2 divisors, whose sum is σ = 1225085900. Its totient is φ = 1225085898.

The previous prime is 1225085861. The next prime is 1225085903. The reversal of 1225085899 is 9985805221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1225085899 - 2¹¹ = 1225083851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225085839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612542949 + 612542950.

It is an arithmetic number, because the mean of its divisors is an integer number (612542950).

Almost surely, 2^1225085899 is an apocalyptic number.

1225085899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225085899 is an equidigital number, since it uses as much as digits as its factorization.

1225085899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 49.

The square root of 1225085899 is about 35001.2271070601. The cubic root of 1225085899 is about 1070.0124897369.

The spelling of 1225085899 in words is "one billion, two hundred twenty-five million, eighty-five thousand, eight hundred ninety-nine".