1240025263457 has 4 divisors (see below), whose sum is σ = 1243212989460. Its totient is φ = 1236837537456.

The previous prime is 1240025263453. The next prime is 1240025263511. The reversal of 1240025263457 is 7543625200421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 632866389841 + 607158873616 = 795529^2 + 779204^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240025263457 - 2² = 1240025263453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240025263453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1593862418 + ... + 1593863195.

It is an arithmetic number, because the mean of its divisors is an integer number (310803247365).

Almost surely, 2^{1240025263457} is an apocalyptic number.

It is an amenable number.

1240025263457 is a deficient number, since it is larger than the sum of its proper divisors (3187726003).

1240025263457 is an equidigital number, since it uses as much as digits as its factorization.

1240025263457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187726002.

The product of its (nonzero) digits is 403200, while the sum is 41.

The spelling of 1240025263457 in words is "one trillion, two hundred forty billion, twenty-five million, two hundred sixty-three thousand, four hundred fifty-seven".