1242159356970 has 256 divisors, whose sum is σ = 3819147770880. Its totient is φ = 281418375168.

The previous prime is 1242159356969. The next prime is 1242159356989. The reversal of 1242159356970 is 796539512421.

1242159356970 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 1 + 5 + 9 + 3 + 569 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 110183254 + ... + 110194526.

It is an arithmetic number, because the mean of its divisors is an integer number (14918545980).

Almost surely, 2^{1242159356970} is an apocalyptic number.

1242159356970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242159356970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909573885440).

1242159356970 is an abundant number, since it is smaller than the sum of its proper divisors (2576988413910).

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

1242159356970 is a wasteful number, since it uses less digits than its factorization.

1242159356970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11806 (or 11800 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 1242159356970 in words is "one trillion, two hundred forty-two billion, one hundred fifty-nine million, three hundred fifty-six thousand, nine hundred seventy".