1021643074 has 8 divisors (see below), whose sum is σ = 1532697660. Its totient is φ = 510743856.

The previous prime is 1021643071. The next prime is 1021643081. The reversal of 1021643074 is 4703461201.

It can be written as a sum of positive squares in 2 ways, for example, as 1007618049 + 14025025 = 31743^2 + 3745^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1021643071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20709 + ... + 49720.

Almost surely, 2^1021643074 is an apocalyptic number.

1021643074 is a deficient number, since it is larger than the sum of its proper divisors (511054586).

1021643074 is an equidigital number, since it uses as much as digits as its factorization.

1021643074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77684.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1021643074 is about 31963.1518158019. The cubic root of 1021643074 is about 1007.1629279590.

The spelling of 1021643074 in words is "one billion, twenty-one million, six hundred forty-three thousand, seventy-four".