1030400021 has 8 divisors (see below), whose sum is σ = 1181160384. Its totient is φ = 880529760.

The previous prime is 1030400017. The next prime is 1030400047. The reversal of 1030400021 is 1200040301.

It is a happy number.

1030400021 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 1030400021 - 2² = 1030400017 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 1030399975 and 1030400011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1030400011) 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, 220040 + ... + 224673.

It is an arithmetic number, because the mean of its divisors is an integer number (147645048).

Almost surely, 2^1030400021 is an apocalyptic number.

It is an amenable number.

1030400021 is a deficient number, since it is larger than the sum of its proper divisors (150760363).

1030400021 is an equidigital number, since it uses as much as digits as its factorization.

1030400021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445051.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1030400021 is about 32099.8445634866. The cubic root of 1030400021 is about 1010.0323555952.

Adding to 1030400021 its reverse (1200040301), we get a palindrome (2230440322).

The spelling of 1030400021 in words is "one billion, thirty million, four hundred thousand, twenty-one".