339257421 has 12 divisors (see below), whose sum is σ = 500465472. Its totient is φ = 221359176.

The previous prime is 339257419. The next prime is 339257441. The reversal of 339257421 is 124752933.

It is not a de Polignac number, because 339257421 - 2¹ = 339257419 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (339257441) 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, 400591 + ... + 401436.

It is an arithmetic number, because the mean of its divisors is an integer number (41705456).

Almost surely, 2^339257421 is an apocalyptic number.

It is an amenable number.

339257421 is a deficient number, since it is larger than the sum of its proper divisors (161208051).

339257421 is a wasteful number, since it uses less digits than its factorization.

339257421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802080 (or 802077 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 339257421 is about 18418.9419077210. The cubic root of 339257421 is about 697.4447113843. Note that the first 3 decimals are identical.

The spelling of 339257421 in words is "three hundred thirty-nine million, two hundred fifty-seven thousand, four hundred twenty-one".