1021978474 has 8 divisors (see below), whose sum is σ = 1672328448. Its totient is φ = 464535660.

The previous prime is 1021978429. The next prime is 1021978487. The reversal of 1021978474 is 4748791201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1021978474.

It is an unprimeable number.

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, 23226762 + ... + 23226805.

It is an arithmetic number, because the mean of its divisors is an integer number (209041056).

Almost surely, 2^1021978474 is an apocalyptic number.

1021978474 is a deficient number, since it is larger than the sum of its proper divisors (650349974).

1021978474 is a wasteful number, since it uses less digits than its factorization.

1021978474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46453580.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 1021978474 is about 31968.3980518261. The cubic root of 1021978474 is about 1007.2731313151.

The spelling of 1021978474 in words is "one billion, twenty-one million, nine hundred seventy-eight thousand, four hundred seventy-four".