1225440497 has 2 divisors, whose sum is σ = 1225440498. Its totient is φ = 1225440496.

The previous prime is 1225440467. The next prime is 1225440499. The reversal of 1225440497 is 7940445221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 705646096 + 519794401 = 26564^2 + 22799^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225440497 - 2⁸ = 1225440241 is a prime.

Together with 1225440499, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1225440497.

It is not a weakly prime, because it can be changed into another prime (1225440499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612720248 + 612720249.

It is an arithmetic number, because the mean of its divisors is an integer number (612720249).

Almost surely, 2^1225440497 is an apocalyptic number.

It is an amenable number.

1225440497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225440497 is an equidigital number, since it uses as much as digits as its factorization.

1225440497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 1225440497 is about 35006.2922486801. The cubic root of 1225440497 is about 1070.1157172431.

The spelling of 1225440497 in words is "one billion, two hundred twenty-five million, four hundred forty thousand, four hundred ninety-seven".