1225255321 has 2 divisors, whose sum is σ = 1225255322. Its totient is φ = 1225255320.

The previous prime is 1225255309. The next prime is 1225255351. The reversal of 1225255321 is 1235525221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 679332096 + 545923225 = 26064^2 + 23365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225255321 - 2⁹ = 1225254809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1225255321.

It is not a weakly prime, because it can be changed into another prime (1225255351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612627660 + 612627661.

It is an arithmetic number, because the mean of its divisors is an integer number (612627661).

Almost surely, 2^1225255321 is an apocalyptic number.

It is an amenable number.

1225255321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225255321 is an equidigital number, since it uses as much as digits as its factorization.

1225255321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 28.

The square root of 1225255321 is about 35003.6472528221. The cubic root of 1225255321 is about 1070.0618128905.

The spelling of 1225255321 in words is "one billion, two hundred twenty-five million, two hundred fifty-five thousand, three hundred twenty-one".