6397445 has 8 divisors (see below), whose sum is σ = 7720440. Its totient is φ = 5088960.

The previous prime is 6397421. The next prime is 6397451. The reversal of 6397445 is 5447936.

It can be written as a sum of positive squares in 4 ways, for example, as 57121 + 6340324 = 239^2 + 2518^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6397445 - 2²⁰ = 5348869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6397399 and 6397408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2630 + ... + 4439.

It is an arithmetic number, because the mean of its divisors is an integer number (965055).

Almost surely, 2^6397445 is an apocalyptic number.

It is an amenable number.

6397445 is a deficient number, since it is larger than the sum of its proper divisors (1322995).

6397445 is a wasteful number, since it uses less digits than its factorization.

6397445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7255.

The product of its digits is 90720, while the sum is 38.

The square root of 6397445 is about 2529.3171015118. The cubic root of 6397445 is about 185.6388432654.

The spelling of 6397445 in words is "six million, three hundred ninety-seven thousand, four hundred forty-five".