1020410521 has 4 divisors (see below), whose sum is σ = 1098903652. Its totient is φ = 941917392.

The previous prime is 1020410519. The next prime is 1020410527. The reversal of 1020410521 is 1250140201.

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 695113225 + 325297296 = 26365^2 + 18036^2 .

It is not a de Polignac number, because 1020410521 - 2¹ = 1020410519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020410495 and 1020410504.

It is not an unprimeable number, because it can be changed into a prime (1020410527) 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, 39246546 + ... + 39246571.

It is an arithmetic number, because the mean of its divisors is an integer number (274725913).

Almost surely, 2^1020410521 is an apocalyptic number.

It is an amenable number.

1020410521 is a deficient number, since it is larger than the sum of its proper divisors (78493131).

1020410521 is an equidigital number, since it uses as much as digits as its factorization.

1020410521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78493130.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1020410521 is about 31943.8651543610. The cubic root of 1020410521 is about 1006.7577371205.

Adding to 1020410521 its reverse (1250140201), we get a palindrome (2270550722).

The spelling of 1020410521 in words is "one billion, twenty million, four hundred ten thousand, five hundred twenty-one".