1147215867 has 32 divisors (see below), whose sum is σ = 1762974720. Its totient is φ = 650017920.

The previous prime is 1147215859. The next prime is 1147215917. The reversal of 1147215867 is 7685127411.

It is not a de Polignac number, because 1147215867 - 2³ = 1147215859 is a prime.

It is a super-2 number, since 2×1147215867² = 2632208490993123378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1147215067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1756513 + ... + 1757165.

It is an arithmetic number, because the mean of its divisors is an integer number (55092960).

Almost surely, 2^1147215867 is an apocalyptic number.

1147215867 is a deficient number, since it is larger than the sum of its proper divisors (615758853).

1147215867 is a wasteful number, since it uses less digits than its factorization.

1147215867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243.

The product of its digits is 94080, while the sum is 42.

The square root of 1147215867 is about 33870.5752386935. The cubic root of 1147215867 is about 1046.8433896472.

The spelling of 1147215867 in words is "one billion, one hundred forty-seven million, two hundred fifteen thousand, eight hundred sixty-seven".