416921 has 4 divisors (see below), whose sum is σ = 435072. Its totient is φ = 398772.

The previous prime is 416887. The next prime is 416947. The reversal of 416921 is 129614.

Added to its reverse (129614) it gives a triangular number (546535 = T₁₀₄₅).

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-416921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 18127 = 416921 / (4 + 1 + 6 + 9 + 2 + 1).

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 416921.

It is not an unprimeable number, because it can be changed into a prime (416621) 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, 9041 + ... + 9086.

It is an arithmetic number, because the mean of its divisors is an integer number (108768).

2⁴¹⁶⁹²¹ is an apocalyptic number.

It is an amenable number.

416921 is a deficient number, since it is larger than the sum of its proper divisors (18151).

416921 is a wasteful number, since it uses less digits than its factorization.

416921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18150.

The product of its digits is 432, while the sum is 23.

The square root of 416921 is about 645.6942000669. The cubic root of 416921 is about 74.7052729597.

Adding to 416921 its reverse (129614), we get a triangular number (546535 = T₁₀₄₅).

The spelling of 416921 in words is "four hundred sixteen thousand, nine hundred twenty-one".