6239405 has 4 divisors (see below), whose sum is σ = 7487292. Its totient is φ = 4991520.

The previous prime is 6239393. The next prime is 6239411. The reversal of 6239405 is 5049326.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3771364 + 2468041 = 1942^2 + 1571^2 .

It is not a de Polignac number, because 6239405 - 2¹⁰ = 6238381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623936 + ... + 623945.

It is an arithmetic number, because the mean of its divisors is an integer number (1871823).

Almost surely, 2^6239405 is an apocalyptic number.

It is an amenable number.

6239405 is a deficient number, since it is larger than the sum of its proper divisors (1247887).

6239405 is a wasteful number, since it uses less digits than its factorization.

6239405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247886.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 6239405 is about 2497.8801012058. The cubic root of 6239405 is about 184.0974298910.

The spelling of 6239405 in words is "six million, two hundred thirty-nine thousand, four hundred five".