916405 has 8 divisors (see below), whose sum is σ = 1256832. Its totient is φ = 628368.

The previous prime is 916387. The next prime is 916411. The reversal of 916405 is 504619.

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

It is a cyclic number.

It is not a de Polignac number, because 916405 - 2¹¹ = 914357 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 916405.

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, 13057 + ... + 13126.

It is an arithmetic number, because the mean of its divisors is an integer number (157104).

2⁹¹⁶⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

916405 is a deficient number, since it is larger than the sum of its proper divisors (340427).

916405 is a wasteful number, since it uses less digits than its factorization.

916405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26195.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 916405 is about 957.2904470431. The cubic root of 916405 is about 97.1320340348.

The spelling of 916405 in words is "nine hundred sixteen thousand, four hundred five".