1343521421 has 8 divisors (see below), whose sum is σ = 1466053344. Its totient is φ = 1221055120.

The previous prime is 1343521409. The next prime is 1343521423. The reversal of 1343521421 is 1241253431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1343521421 - 2¹⁸ = 1343259277 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 (1343521423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32855 + ... + 61371.

It is an arithmetic number, because the mean of its divisors is an integer number (183256668).

Almost surely, 2^1343521421 is an apocalyptic number.

1343521421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1343521421 is a deficient number, since it is larger than the sum of its proper divisors (122531923).

1343521421 is a wasteful number, since it uses less digits than its factorization.

1343521421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32811.

The product of its digits is 2880, while the sum is 26.

The square root of 1343521421 is about 36654.0778222560. The cubic root of 1343521421 is about 1103.4386665916.

Adding to 1343521421 its reverse (1241253431), we get a palindrome (2584774852).

The spelling of 1343521421 in words is "one billion, three hundred forty-three million, five hundred twenty-one thousand, four hundred twenty-one".