1001416621 has 4 divisors (see below), whose sum is σ = 1001506492. Its totient is φ = 1001326752.

The previous prime is 1001416613. The next prime is 1001416627. The reversal of 1001416621 is 1266141001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 544055625 + 457360996 = 23325^2 + 21386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001416621 - 2³ = 1001416613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001416592 and 1001416601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001416627) 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, 25386 + ... + 51451.

It is an arithmetic number, because the mean of its divisors is an integer number (250376623).

Almost surely, 2^1001416621 is an apocalyptic number.

It is an amenable number.

1001416621 is a deficient number, since it is larger than the sum of its proper divisors (89871).

1001416621 is an equidigital number, since it uses as much as digits as its factorization.

1001416621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89870.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1001416621 is about 31645.1674193707. The cubic root of 1001416621 is about 1000.4719841959.

Adding to 1001416621 its reverse (1266141001), we get a palindrome (2267557622).

The spelling of 1001416621 in words is "one billion, one million, four hundred sixteen thousand, six hundred twenty-one".