1043420021 has 8 divisors (see below), whose sum is σ = 1193925120. Its totient is φ = 893276208.

The previous prime is 1043420009. The next prime is 1043420039. The reversal of 1043420021 is 1200243401.

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 1043420021 - 2¹⁰ = 1043418997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043420051) 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 7 ways as a sum of consecutive naturals, for example, 84101 + ... + 95706.

It is an arithmetic number, because the mean of its divisors is an integer number (149240640).

Almost surely, 2^1043420021 is an apocalyptic number.

It is an amenable number.

1043420021 is a deficient number, since it is larger than the sum of its proper divisors (150505099).

1043420021 is an equidigital number, since it uses as much as digits as its factorization.

1043420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180643.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1043420021 is about 32302.0126462733. The cubic root of 1043420021 is about 1014.2687740561.

Adding to 1043420021 its reverse (1200243401), we get a palindrome (2243663422).

The spelling of 1043420021 in words is "one billion, forty-three million, four hundred twenty thousand, twenty-one".