1002171272 has 32 divisors (see below), whose sum is σ = 1962532800. Its totient is φ = 478868544.

The previous prime is 1002171253. The next prime is 1002171277. The reversal of 1002171272 is 2721712001.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (1002171277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312863 + ... + 316049.

It is an arithmetic number, because the mean of its divisors is an integer number (61329150).

Almost surely, 2^1002171272 is an apocalyptic number.

It is an amenable number.

1002171272 is a deficient number, since it is larger than the sum of its proper divisors (960361528).

1002171272 is a wasteful number, since it uses less digits than its factorization.

1002171272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4925 (or 4921 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 1002171272 is about 31657.0888111968. The cubic root of 1002171272 is about 1000.7232341396.

Adding to 1002171272 its reverse (2721712001), we get a palindrome (3723883273).

The spelling of 1002171272 in words is "one billion, two million, one hundred seventy-one thousand, two hundred seventy-two".