1353443421 has 32 divisors (see below), whose sum is σ = 2008281600. Its totient is φ = 803842880.

The previous prime is 1353443383. The next prime is 1353443453. The reversal of 1353443421 is 1243443531.

It is a cyclic number.

It is not a de Polignac number, because 1353443421 - 2¹⁷ = 1353312349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1353443521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 756490 + ... + 758276.

It is an arithmetic number, because the mean of its divisors is an integer number (62758800).

Almost surely, 2^1353443421 is an apocalyptic number.

1353443421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1353443421 is a deficient number, since it is larger than the sum of its proper divisors (654838179).

1353443421 is a wasteful number, since it uses less digits than its factorization.

1353443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249.

The product of its digits is 17280, while the sum is 30.

The square root of 1353443421 is about 36789.1753237280. The cubic root of 1353443421 is about 1106.1483311461.

Adding to 1353443421 its reverse (1243443531), we get a palindrome (2596886952).

The spelling of 1353443421 in words is "one billion, three hundred fifty-three million, four hundred forty-three thousand, four hundred twenty-one".