1020526421 has 4 divisors (see below), whose sum is σ = 1031993100. Its totient is φ = 1009059744.

The previous prime is 1020526411. The next prime is 1020526433. The reversal of 1020526421 is 1246250201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107640625 + 912885796 = 10375^2 + 30214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020526421 - 2¹⁸ = 1020264277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020526411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5733206 + ... + 5733383.

It is an arithmetic number, because the mean of its divisors is an integer number (257998275).

Almost surely, 2^1020526421 is an apocalyptic number.

It is an amenable number.

1020526421 is a deficient number, since it is larger than the sum of its proper divisors (11466679).

1020526421 is an equidigital number, since it uses as much as digits as its factorization.

1020526421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11466678.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1020526421 is about 31945.6792227055. The cubic root of 1020526421 is about 1006.7958521085.

Adding to 1020526421 its reverse (1246250201), we get a palindrome (2266776622).

The spelling of 1020526421 in words is "one billion, twenty million, five hundred twenty-six thousand, four hundred twenty-one".