1344021621 has 16 divisors (see below), whose sum is σ = 1813279104. Its totient is φ = 885417984.

The previous prime is 1344021607. The next prime is 1344021641. The reversal of 1344021621 is 1261204431.

It is not a de Polignac number, because 1344021621 - 2⁷ = 1344021493 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1344021591 and 1344021600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1344021641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208381 + ... + 214733.

It is an arithmetic number, because the mean of its divisors is an integer number (113329944).

Almost surely, 2^1344021621 is an apocalyptic number.

It is an amenable number.

1344021621 is a deficient number, since it is larger than the sum of its proper divisors (469257483).

1344021621 is an equidigital number, since it uses as much as digits as its factorization.

1344021621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1344021621 is about 36660.9004390236. The cubic root of 1344021621 is about 1103.5755882489.

The spelling of 1344021621 in words is "one billion, three hundred forty-four million, twenty-one thousand, six hundred twenty-one".