1225460639981 has 2 divisors, whose sum is σ = 1225460639982. Its totient is φ = 1225460639980.

The previous prime is 1225460639959. The next prime is 1225460640007. The reversal of 1225460639981 is 1899360645221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1183069536100 + 42391103881 = 1087690^2 + 205891^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225460639981 - 2²² = 1225456445677 is a prime.

It is a super-2 number, since 2×1225460639981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225460639911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612730319990 + 612730319991.

It is an arithmetic number, because the mean of its divisors is an integer number (612730319991).

Almost surely, 2^{1225460639981} is an apocalyptic number.

It is an amenable number.

1225460639981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225460639981 is an equidigital number, since it uses as much as digits as its factorization.

1225460639981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 1225460639981 in words is "one trillion, two hundred twenty-five billion, four hundred sixty million, six hundred thirty-nine thousand, nine hundred eighty-one".