1000129216 has 14 divisors (see below), whose sum is σ = 1984631540. Its totient is φ = 500064576.

The previous prime is 1000129211. The next prime is 1000129219. The reversal of 1000129216 is 6129210001.

It is not an unprimeable number, because it can be changed into a prime (1000129211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7813446 + ... + 7813573.

Almost surely, 2^1000129216 is an apocalyptic number.

1000129216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1000129216 is a deficient number, since it is larger than the sum of its proper divisors (984502324).

1000129216 is an equidigital number, since it uses as much as digits as its factorization.

1000129216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15627031 (or 15627021 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1000129216 is about 31624.8196200389. The cubic root of 1000129216 is about 1000.0430701449.

Adding to 1000129216 its reverse (6129210001), we get a palindrome (7129339217).

The spelling of 1000129216 in words is "one billion, one hundred twenty-nine thousand, two hundred sixteen".