1021402243 has 8 divisors (see below), whose sum is σ = 1056988800. Its totient is φ = 985840128.

The previous prime is 1021402231. The next prime is 1021402253. The reversal of 1021402243 is 3422041201.

1021402243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 1021402243 - 2²⁵ = 987847811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021402243.

It is not an unprimeable number, because it can be changed into a prime (1021402253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132643 + ... + 140131.

It is an arithmetic number, because the mean of its divisors is an integer number (132123600).

Almost surely, 2^1021402243 is an apocalyptic number.

1021402243 is a deficient number, since it is larger than the sum of its proper divisors (35586557).

1021402243 is an equidigital number, since it uses as much as digits as its factorization.

1021402243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12221.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1021402243 is about 31959.3842712903. The cubic root of 1021402243 is about 1007.0837825370.

Adding to 1021402243 its reverse (3422041201), we get a palindrome (4443443444).

The spelling of 1021402243 in words is "one billion, twenty-one million, four hundred two thousand, two hundred forty-three".