6406415 has 4 divisors (see below), whose sum is σ = 7687704. Its totient is φ = 5125128.

The previous prime is 6406381. The next prime is 6406427. The reversal of 6406415 is 5146046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5146046 = 2 ⋅2573023.

It is a cyclic number.

It is not a de Polignac number, because 6406415 - 2¹⁰ = 6405391 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, 640637 + ... + 640646.

It is an arithmetic number, because the mean of its divisors is an integer number (1921926).

Almost surely, 2^6406415 is an apocalyptic number.

6406415 is a deficient number, since it is larger than the sum of its proper divisors (1281289).

6406415 is a wasteful number, since it uses less digits than its factorization.

6406415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281288.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 6406415 is about 2531.0896862814. The cubic root of 6406415 is about 185.7255655307.

The spelling of 6406415 in words is "six million, four hundred six thousand, four hundred fifteen".