41025421621 has 4 divisors (see below), whose sum is σ = 41587413772. Its totient is φ = 40463429472.

The previous prime is 41025421603. The next prime is 41025421631. The reversal of 41025421621 is 12612452014.

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 34184312100 + 6841109521 = 184890^2 + 82711^2 .

It is a cyclic number.

It is not a de Polignac number, because 41025421621 - 2¹⁵ = 41025388853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 41025421621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41025421631) 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, 280995966 + ... + 280996111.

It is an arithmetic number, because the mean of its divisors is an integer number (10396853443).

Almost surely, 2^41025421621 is an apocalyptic number.

It is an amenable number.

41025421621 is a deficient number, since it is larger than the sum of its proper divisors (561992151).

41025421621 is an equidigital number, since it uses as much as digits as its factorization.

41025421621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561992150.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 41025421621 its reverse (12612452014), we get a palindrome (53637873635).

The spelling of 41025421621 in words is "forty-one billion, twenty-five million, four hundred twenty-one thousand, six hundred twenty-one".