1225204619 has 2 divisors, whose sum is σ = 1225204620. Its totient is φ = 1225204618.

The previous prime is 1225204609. The next prime is 1225204649. The reversal of 1225204619 is 9164025221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225204619 is a prime.

It is a super-2 number, since 2×1225204619² = 3002252716837870322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1225204609) 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, 612602309 + 612602310.

It is an arithmetic number, because the mean of its divisors is an integer number (612602310).

Almost surely, 2^1225204619 is an apocalyptic number.

1225204619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225204619 is an equidigital number, since it uses as much as digits as its factorization.

1225204619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1225204619 is about 35002.9230065148. The cubic root of 1225204619 is about 1070.0470526955.

The spelling of 1225204619 in words is "one billion, two hundred twenty-five million, two hundred four thousand, six hundred nineteen".