1021420452 has 192 divisors, whose sum is σ = 2850059520. Its totient is φ = 283465728.

The previous prime is 1021420451. The next prime is 1021420459. The reversal of 1021420452 is 2540241201.

1021420452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021420451) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19272058 + ... + 19272110.

It is an arithmetic number, because the mean of its divisors is an integer number (14844060).

Almost surely, 2^1021420452 is an apocalyptic number.

1021420452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021420452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1425029760).

1021420452 is an abundant number, since it is smaller than the sum of its proper divisors (1828639068).

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

1021420452 is a wasteful number, since it uses less digits than its factorization.

1021420452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1021420452 is about 31959.6691472237. The cubic root of 1021420452 is about 1007.0897670808.

Adding to 1021420452 its reverse (2540241201), we get a palindrome (3561661653).

The spelling of 1021420452 in words is "one billion, twenty-one million, four hundred twenty thousand, four hundred fifty-two".