1241555556072 has 64 divisors (see below), whose sum is σ = 3357375094080. Its totient is φ = 380334177792.

The previous prime is 1241555556019. The next prime is 1241555556077. The reversal of 1241555556072 is 2706555551421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1241555556077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8694253 + ... + 8835900.

It is an arithmetic number, because the mean of its divisors is an integer number (52458985845).

Almost surely, 2^{1241555556072} is an apocalyptic number.

1241555556072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1241555556072 is an abundant number, since it is smaller than the sum of its proper divisors (2115819538008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1241555556072 is a wasteful number, since it uses less digits than its factorization.

1241555556072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17530402 (or 17530398 counting only the distinct ones).

The product of its (nonzero) digits is 2100000, while the sum is 48.

The spelling of 1241555556072 in words is "one trillion, two hundred forty-one billion, five hundred fifty-five million, five hundred fifty-six thousand, seventy-two".