1242770026889 has 8 divisors (see below), whose sum is σ = 1243883232072. Its totient is φ = 1241657320320.

The previous prime is 1242770026873. The next prime is 1242770026891. The reversal of 1242770026889 is 9886200772421.

It can be written as a sum of positive squares in 4 ways, for example, as 40106871289 + 1202663155600 = 200267^2 + 1096660^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242770026889 - 2⁴ = 1242770026873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242770026819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4954679 + ... + 5199459.

It is an arithmetic number, because the mean of its divisors is an integer number (155485404009).

Almost surely, 2^{1242770026889} is an apocalyptic number.

It is an amenable number.

1242770026889 is a deficient number, since it is larger than the sum of its proper divisors (1113205183).

1242770026889 is a wasteful number, since it uses less digits than its factorization.

1242770026889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249307.

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 1242770026889 in words is "one trillion, two hundred forty-two billion, seven hundred seventy million, twenty-six thousand, eight hundred eighty-nine".