1225365887 has 2 divisors, whose sum is σ = 1225365888. Its totient is φ = 1225365886.

The previous prime is 1225365877. The next prime is 1225365907. The reversal of 1225365887 is 7885635221.

It is a weak prime.

It is an emirp because it is prime and its reverse (7885635221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225365887 - 2¹⁸ = 1225103743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225365877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612682943 + 612682944.

It is an arithmetic number, because the mean of its divisors is an integer number (612682944).

Almost surely, 2^1225365887 is an apocalyptic number.

1225365887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225365887 is an equidigital number, since it uses as much as digits as its factorization.

1225365887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 47.

The square root of 1225365887 is about 35005.2265669000. The cubic root of 1225365887 is about 1070.0939990789.

The spelling of 1225365887 in words is "one billion, two hundred twenty-five million, three hundred sixty-five thousand, eight hundred eighty-seven".