1240261220225 has 12 divisors (see below), whose sum is σ = 1538012904624. Its totient is φ = 992151562320.

The previous prime is 1240261220179. The next prime is 1240261220249. The reversal of 1240261220225 is 5220221620421.

It is a happy number.

It is not a de Polignac number, because 1240261220225 - 2²² = 1240257025921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 991979 + ... + 1861328.

It is an arithmetic number, because the mean of its divisors is an integer number (128167742052).

Almost surely, 2^{1240261220225} is an apocalyptic number.

It is an amenable number.

1240261220225 is a deficient number, since it is larger than the sum of its proper divisors (297751684399).

1240261220225 is a wasteful number, since it uses less digits than its factorization.

1240261220225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870704 (or 2870699 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 1240261220225 its reverse (5220221620421), we get a palindrome (6460482840646).

The spelling of 1240261220225 in words is "one trillion, two hundred forty billion, two hundred sixty-one million, two hundred twenty thousand, two hundred twenty-five".