1020521424 has 120 divisors (see below), whose sum is σ = 3016508320. Its totient is φ = 295483392.

The previous prime is 1020521417. The next prime is 1020521429. The reversal of 1020521424 is 4241250201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020521424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020521429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177507 + ... + 183165.

Almost surely, 2^1020521424 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 1020521424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1508254160).

1020521424 is an abundant number, since it is smaller than the sum of its proper divisors (1995986896).

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

1020521424 is a wasteful number, since it uses less digits than its factorization.

1020521424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5717 (or 5694 counting only the distinct ones).

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

The square root of 1020521424 is about 31945.6010117199. The cubic root of 1020521424 is about 1006.7942088497.

Adding to 1020521424 its reverse (4241250201), we get a palindrome (5261771625).

The spelling of 1020521424 in words is "one billion, twenty million, five hundred twenty-one thousand, four hundred twenty-four".