1000432021 has 6 divisors (see below), whose sum is σ = 1025429666. Its totient is φ = 976029600.

The previous prime is 1000432019. The next prime is 1000432033. The reversal of 1000432021 is 1202340001.

1000432021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 285136996 + 715295025 = 16886^2 + 26745^2 .

It is not a de Polignac number, because 1000432021 - 2¹ = 1000432019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000431992 and 1000432010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000432921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 295890 + ... + 299251.

Almost surely, 2^1000432021 is an apocalyptic number.

It is an amenable number.

1000432021 is a deficient number, since it is larger than the sum of its proper divisors (24997645).

1000432021 is an frugal number, since it uses more digits than its factorization.

1000432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595223 (or 595182 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1000432021 is about 31629.6067158604. The cubic root of 1000432021 is about 1000.1439862670.

Adding to 1000432021 its reverse (1202340001), we get a palindrome (2202772022).

It can be divided in two parts, 10004 and 32021, that added together give a square (42025 = 205²).

The spelling of 1000432021 in words is "one billion, four hundred thirty-two thousand, twenty-one".