1343837421 has 12 divisors (see below), whose sum is σ = 1960318620. Its totient is φ = 887020800.

The previous prime is 1343837393. The next prime is 1343837423. The reversal of 1343837421 is 1247383431.

It can be written as a sum of positive squares in 2 ways, for example, as 610781796 + 733055625 = 24714^2 + 27075^2 .

It is not a de Polignac number, because 1343837421 - 2¹¹ = 1343835373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343837423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 738276 + ... + 740093.

It is an arithmetic number, because the mean of its divisors is an integer number (163359885).

Almost surely, 2^1343837421 is an apocalyptic number.

It is an amenable number.

1343837421 is a deficient number, since it is larger than the sum of its proper divisors (616481199).

1343837421 is a wasteful number, since it uses less digits than its factorization.

1343837421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478476 (or 1478473 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 1343837421 is about 36658.3881396878. The cubic root of 1343837421 is about 1103.5251704313.

The spelling of 1343837421 in words is "one billion, three hundred forty-three million, eight hundred thirty-seven thousand, four hundred twenty-one".