1240551551245 has 16 divisors (see below), whose sum is σ = 1489386113280. Its totient is φ = 991958560384.

The previous prime is 1240551551231. The next prime is 1240551551251. The reversal of 1240551551245 is 5421551550421.

It is a cyclic number.

It is not a de Polignac number, because 1240551551245 - 2²³ = 1240543162637 is a prime.

It is a super-2 number, since 2×1240551551245² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1240551551198 and 1240551551207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149513937 + ... + 149522233.

It is an arithmetic number, because the mean of its divisors is an integer number (93086632080).

Almost surely, 2^{1240551551245} is an apocalyptic number.

It is an amenable number.

1240551551245 is a deficient number, since it is larger than the sum of its proper divisors (248834562035).

1240551551245 is an equidigital number, since it uses as much as digits as its factorization.

1240551551245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19244.

The product of its (nonzero) digits is 200000, while the sum is 40.

The spelling of 1240551551245 in words is "one trillion, two hundred forty billion, five hundred fifty-one million, five hundred fifty-one thousand, two hundred forty-five".