1287066147 has 4 divisors (see below), whose sum is σ = 1716088200. Its totient is φ = 858044096.

The previous prime is 1287066119. The next prime is 1287066163. The reversal of 1287066147 is 7416607821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1287066147 - 2¹⁴ = 1287049763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1287066099 and 1287066108.

It is not an unprimeable number, because it can be changed into a prime (1287066247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214511022 + ... + 214511027.

It is an arithmetic number, because the mean of its divisors is an integer number (429022050).

Almost surely, 2^1287066147 is an apocalyptic number.

1287066147 is a deficient number, since it is larger than the sum of its proper divisors (429022053).

1287066147 is an equidigital number, since it uses as much as digits as its factorization.

1287066147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429022052.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 1287066147 is about 35875.7041324627. The cubic root of 1287066147 is about 1087.7613473612.

The spelling of 1287066147 in words is "one billion, two hundred eighty-seven million, sixty-six thousand, one hundred forty-seven".