1020812544 has 180 divisors, whose sum is σ = 3205319040. Its totient is φ = 322237440.

The previous prime is 1020812539. The next prime is 1020812591. The reversal of 1020812544 is 4452180201.

1020812544 is a `hidden beast` number, since 102 + 0 + 8 + 12 + 544 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 392689 + ... + 395279.

It is an arithmetic number, because the mean of its divisors is an integer number (17807328).

Almost surely, 2^1020812544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020812544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1602659520).

1020812544 is an abundant number, since it is smaller than the sum of its proper divisors (2184506496).

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

1020812544 is an equidigital number, since it uses as much as digits as its factorization.

1020812544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638 (or 2615 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 1020812544 is about 31950.1571827119. The cubic root of 1020812544 is about 1006.8899344455.

Adding to 1020812544 its reverse (4452180201), we get a palindrome (5472992745).

The spelling of 1020812544 in words is "one billion, twenty million, eight hundred twelve thousand, five hundred forty-four".