416391 has 4 divisors (see below), whose sum is σ = 555192. Its totient is φ = 277592.

The previous prime is 416389. The next prime is 416393. The reversal of 416391 is 193614.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (416389) and next prime (416393).

It is a cyclic number.

It is not a de Polignac number, because 416391 - 2¹ = 416389 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (416393) 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, 69396 + ... + 69401.

It is an arithmetic number, because the mean of its divisors is an integer number (138798).

2⁴¹⁶³⁹¹ is an apocalyptic number.

416391 is a deficient number, since it is larger than the sum of its proper divisors (138801).

416391 is a wasteful number, since it uses less digits than its factorization.

416391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138800.

The product of its digits is 648, while the sum is 24.

The square root of 416391 is about 645.2836585565. The cubic root of 416391 is about 74.6736038233.

The spelling of 416391 in words is "four hundred sixteen thousand, three hundred ninety-one".