6909245 has 12 divisors (see below), whose sum is σ = 9645084. Its totient is φ = 4737600.

The previous prime is 6909173. The next prime is 6909247. The reversal of 6909245 is 5429096.

It can be written as a sum of positive squares in 2 ways, for example, as 3545689 + 3363556 = 1883^2 + 1834^2 .

It is not a de Polignac number, because 6909245 - 2¹² = 6905149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6909247) 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, 13856 + ... + 14345.

It is an arithmetic number, because the mean of its divisors is an integer number (803757).

Almost surely, 2^6909245 is an apocalyptic number.

It is an amenable number.

6909245 is a deficient number, since it is larger than the sum of its proper divisors (2735839).

6909245 is a wasteful number, since it uses less digits than its factorization.

6909245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28220 (or 28213 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 6909245 is about 2628.5442739281. The cubic root of 6909245 is about 190.4628144823.

The spelling of 6909245 in words is "six million, nine hundred nine thousand, two hundred forty-five".