1225054321 has 2 divisors, whose sum is σ = 1225054322. Its totient is φ = 1225054320.

The previous prime is 1225054301. The next prime is 1225054339. The reversal of 1225054321 is 1234505221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1222201600 + 2852721 = 34960^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225054321 - 2²³ = 1216665713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225054301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612527160 + 612527161.

It is an arithmetic number, because the mean of its divisors is an integer number (612527161).

Almost surely, 2^1225054321 is an apocalyptic number.

It is an amenable number.

1225054321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225054321 is an equidigital number, since it uses as much as digits as its factorization.

1225054321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1225054321 is about 35000.7760056831. The cubic root of 1225054321 is about 1070.0032960565.

Adding to 1225054321 its reverse (1234505221), we get a palindrome (2459559542).

The spelling of 1225054321 in words is "one billion, two hundred twenty-five million, fifty-four thousand, three hundred twenty-one".