6420926 has 4 divisors (see below), whose sum is σ = 9631392. Its totient is φ = 3210462.

The previous prime is 6420913. The next prime is 6420959. The reversal of 6420926 is 6290246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6290246 = 2 ⋅3145123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605230 + ... + 1605233.

It is an arithmetic number, because the mean of its divisors is an integer number (2407848).

Almost surely, 2^6420926 is an apocalyptic number.

6420926 is a deficient number, since it is larger than the sum of its proper divisors (3210466).

6420926 is a wasteful number, since it uses less digits than its factorization.

6420926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210465.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6420926 is about 2533.9546167996. The cubic root of 6420926 is about 185.8656871327.

The spelling of 6420926 in words is "six million, four hundred twenty thousand, nine hundred twenty-six".