1215071454240 has 576 divisors, whose sum is σ = 4854779145216. Its totient is φ = 270947690496.

The previous prime is 1215071454139. The next prime is 1215071454241. The reversal of 1215071454240 is 424541705121.

1215071454240 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 0 + 71 + 4 + 542 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1215071454195 and 1215071454204.

It is not an unprimeable number, because it can be changed into a prime (1215071454241) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 705206019 + ... + 705207741.

It is an arithmetic number, because the mean of its divisors is an integer number (8428436016).

Almost surely, 2^{1215071454240} is an apocalyptic number.

1215071454240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215071454240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2427389572608).

1215071454240 is an abundant number, since it is smaller than the sum of its proper divisors (3639707690976).

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

1215071454240 is a wasteful number, since it uses less digits than its factorization.

1215071454240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421 (or 3410 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The spelling of 1215071454240 in words is "one trillion, two hundred fifteen billion, seventy-one million, four hundred fifty-four thousand, two hundred forty".