1021400432 has 20 divisors (see below), whose sum is σ = 2131191720. Its totient is φ = 471415488.

The previous prime is 1021400383. The next prime is 1021400449. The reversal of 1021400432 is 2340041201.

1021400432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1021400432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2455082 + ... + 2455497.

It is an arithmetic number, because the mean of its divisors is an integer number (106559586).

Almost surely, 2^1021400432 is an apocalyptic number.

It is an amenable number.

1021400432 is an abundant number, since it is smaller than the sum of its proper divisors (1109791288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021400432 is a wasteful number, since it uses less digits than its factorization.

1021400432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4910600 (or 4910594 counting only the distinct ones).

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

The square root of 1021400432 is about 31959.3559384416. The cubic root of 1021400432 is about 1007.0831873324.

Adding to 1021400432 its reverse (2340041201), we get a palindrome (3361441633).

The spelling of 1021400432 in words is "one billion, twenty-one million, four hundred thousand, four hundred thirty-two".