1021420422 has 64 divisors (see below), whose sum is σ = 2482444800. Its totient is φ = 308737440.

The previous prime is 1021420369. The next prime is 1021420423. The reversal of 1021420422 is 2240241201.

1021420422 is a `hidden beast` number, since 10 + 214 + 20 + 422 = 666.

1021420422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1021420395 and 1021420404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021420423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258808 + ... + 262724.

It is an arithmetic number, because the mean of its divisors is an integer number (38788200).

Almost surely, 2^1021420422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021420422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1241222400).

1021420422 is an abundant number, since it is smaller than the sum of its proper divisors (1461024378).

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

1021420422 is a wasteful number, since it uses less digits than its factorization.

1021420422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4378 (or 4372 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1021420422 is about 31959.6686778821. The cubic root of 1021420422 is about 1007.0897572211.

Adding to 1021420422 its reverse (2240241201), we get a palindrome (3261661623).

The spelling of 1021420422 in words is "one billion, twenty-one million, four hundred twenty thousand, four hundred twenty-two".