1001530421 has 2 divisors, whose sum is σ = 1001530422. Its totient is φ = 1001530420.

The previous prime is 1001530403. The next prime is 1001530427. The reversal of 1001530421 is 1240351001.

1001530421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1001026321 + 504100 = 31639^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001530421 - 2⁶ = 1001530357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001530421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001530427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500765210 + 500765211.

It is an arithmetic number, because the mean of its divisors is an integer number (500765211).

Almost surely, 2^1001530421 is an apocalyptic number.

It is an amenable number.

1001530421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001530421 is an equidigital number, since it uses as much as digits as its factorization.

1001530421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1001530421 is about 31646.9654311436. The cubic root of 1001530421 is about 1000.5098803112.

Adding to 1001530421 its reverse (1240351001), we get a palindrome (2241881422).

The spelling of 1001530421 in words is "one billion, one million, five hundred thirty thousand, four hundred twenty-one".