1449448621 has 4 divisors (see below), whose sum is σ = 1453175100. Its totient is φ = 1445722144.

The previous prime is 1449448613. The next prime is 1449448657. The reversal of 1449448621 is 1268449441.

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 184579396 + 1264869225 = 13586^2 + 35565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1449448621 - 2³ = 1449448613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1449449621) 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, 1862656 + ... + 1863433.

It is an arithmetic number, because the mean of its divisors is an integer number (363293775).

Almost surely, 2^1449448621 is an apocalyptic number.

It is an amenable number.

1449448621 is a deficient number, since it is larger than the sum of its proper divisors (3726479).

1449448621 is an equidigital number, since it uses as much as digits as its factorization.

1449448621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726478.

The product of its digits is 221184, while the sum is 43.

The square root of 1449448621 is about 38071.6248799549. The cubic root of 1449448621 is about 1131.7077113419.

The spelling of 1449448621 in words is "one billion, four hundred forty-nine million, four hundred forty-eight thousand, six hundred twenty-one".