1242167863887 has 12 divisors (see below), whose sum is σ = 1860695895240. Its totient is φ = 828111909096.

The previous prime is 1242167863837. The next prime is 1242167863891. The reversal of 1242167863887 is 7883687612421.

It is a happy number.

1242167863887 is a `hidden beast` number, since 1 + 2 + 421 + 6 + 78 + 63 + 8 + 87 = 666.

It is not a de Polignac number, because 1242167863887 - 2¹⁵ = 1242167831119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242167863837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2555900712 + ... + 2555901197.

It is an arithmetic number, because the mean of its divisors is an integer number (155057991270).

Almost surely, 2^{1242167863887} is an apocalyptic number.

1242167863887 is a deficient number, since it is larger than the sum of its proper divisors (618528031353).

1242167863887 is an frugal number, since it uses more digits than its factorization.

1242167863887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5111801924 (or 5111801912 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 63.

The spelling of 1242167863887 in words is "one trillion, two hundred forty-two billion, one hundred sixty-seven million, eight hundred sixty-three thousand, eight hundred eighty-seven".