1441357621 has 4 divisors (see below), whose sum is σ = 1572390144. Its totient is φ = 1310325100.

The previous prime is 1441357553. The next prime is 1441357633. The reversal of 1441357621 is 1267531441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1441357621 is a prime.

It is a super-2 number, since 2×1441357621² = 4155023583229559282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1441357691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65516245 + ... + 65516266.

It is an arithmetic number, because the mean of its divisors is an integer number (393097536).

Almost surely, 2^1441357621 is an apocalyptic number.

1441357621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1441357621 is a deficient number, since it is larger than the sum of its proper divisors (131032523).

1441357621 is a wasteful number, since it uses less digits than its factorization.

1441357621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131032522.

The product of its digits is 20160, while the sum is 34.

The square root of 1441357621 is about 37965.2159351162. The cubic root of 1441357621 is about 1129.5980038212.

The spelling of 1441357621 in words is "one billion, four hundred forty-one million, three hundred fifty-seven thousand, six hundred twenty-one".