6405497 has 4 divisors (see below), whose sum is σ = 7320576. Its totient is φ = 5490420.

The previous prime is 6405493. The next prime is 6405517. The reversal of 6405497 is 7945046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7945046 = 2 ⋅3972523.

It is a cyclic number.

It is not a de Polignac number, because 6405497 - 2² = 6405493 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6⁸ + 4 + 0 + 5³ + 4¹¹ + 9⁶ + 7 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6405493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457529 + ... + 457542.

It is an arithmetic number, because the mean of its divisors is an integer number (1830144).

Almost surely, 2^6405497 is an apocalyptic number.

It is an amenable number.

6405497 is a deficient number, since it is larger than the sum of its proper divisors (915079).

6405497 is an equidigital number, since it uses as much as digits as its factorization.

6405497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915078.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 6405497 is about 2530.9083349659. The cubic root of 6405497 is about 185.7166939953.

The spelling of 6405497 in words is "six million, four hundred five thousand, four hundred ninety-seven".