1225863329 has 2 divisors, whose sum is σ = 1225863330. Its totient is φ = 1225863328.

The previous prime is 1225863281. The next prime is 1225863367. The reversal of 1225863329 is 9233685221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012703329 + 213160000 = 31823^2 + 14600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225863329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225863229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612931664 + 612931665.

It is an arithmetic number, because the mean of its divisors is an integer number (612931665).

Almost surely, 2^1225863329 is an apocalyptic number.

It is an amenable number.

1225863329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225863329 is an equidigital number, since it uses as much as digits as its factorization.

1225863329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 1225863329 is about 35012.3310991999. The cubic root of 1225863329 is about 1070.2387824153.

The spelling of 1225863329 in words is "one billion, two hundred twenty-five million, eight hundred sixty-three thousand, three hundred twenty-nine".