1225555259 has 2 divisors, whose sum is σ = 1225555260. Its totient is φ = 1225555258.

The previous prime is 1225555249. The next prime is 1225555291. The reversal of 1225555259 is 9525555221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225555259 - 2¹² = 1225551163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225555249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612777629 + 612777630.

It is an arithmetic number, because the mean of its divisors is an integer number (612777630).

Almost surely, 2^1225555259 is an apocalyptic number.

1225555259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225555259 is an equidigital number, since it uses as much as digits as its factorization.

1225555259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225000, while the sum is 41.

The square root of 1225555259 is about 35007.9313727618. The cubic root of 1225555259 is about 1070.1491214998.

The spelling of 1225555259 in words is "one billion, two hundred twenty-five million, five hundred fifty-five thousand, two hundred fifty-nine".