1021678072 has 16 divisors (see below), whose sum is σ = 1942628400. Its totient is φ = 503643840.

The previous prime is 1021678061. The next prime is 1021678079. The reversal of 1021678072 is 2708761201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021678079) 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 3 ways as a sum of consecutive naturals, for example, 898797 + ... + 899932.

It is an arithmetic number, because the mean of its divisors is an integer number (121414275).

Almost surely, 2^1021678072 is an apocalyptic number.

It is an amenable number.

1021678072 is a deficient number, since it is larger than the sum of its proper divisors (920950328).

1021678072 is a wasteful number, since it uses less digits than its factorization.

1021678072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798806 (or 1798802 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1021678072 is about 31963.6992852830. The cubic root of 1021678072 is about 1007.1744284809.

It can be divided in two parts, 10216 and 78072, that added together give a palindrome (88288).

The spelling of 1021678072 in words is "one billion, twenty-one million, six hundred seventy-eight thousand, seventy-two".