1225949319787 has 2 divisors, whose sum is σ = 1225949319788. Its totient is φ = 1225949319786.

The previous prime is 1225949319743. The next prime is 1225949319811. The reversal of 1225949319787 is 7879139495221.

It is a strong prime.

It is an emirp because it is prime and its reverse (7879139495221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225949319787 - 2¹⁹ = 1225948795499 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225949319737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612974659893 + 612974659894.

It is an arithmetic number, because the mean of its divisors is an integer number (612974659894).

Almost surely, 2^{1225949319787} is an apocalyptic number.

1225949319787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225949319787 is an equidigital number, since it uses as much as digits as its factorization.

1225949319787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68584320, while the sum is 67.

The spelling of 1225949319787 in words is "one trillion, two hundred twenty-five billion, nine hundred forty-nine million, three hundred nineteen thousand, seven hundred eighty-seven".