73426 has 4 divisors (see below), whose sum is σ = 110142. Its totient is φ = 36712.

The previous prime is 73421. The next prime is 73433. The reversal of 73426 is 62437.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62437 = 29 ⋅2153.

It can be written as a sum of positive squares in only one way, i.e., 50625 + 22801 = 225^2 + 151^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 7 + 3⁷ + 4⁷ + 2¹³ + 6⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 73397 and 73406.

It is not an unprimeable number, because it can be changed into a prime (73421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18355 + ... + 18358.

2⁷³⁴²⁶ is an apocalyptic number.

73426 is a deficient number, since it is larger than the sum of its proper divisors (36716).

73426 is a wasteful number, since it uses less digits than its factorization.

73426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36715.

The product of its digits is 1008, while the sum is 22.

The square root of 73426 is about 270.9723233100. The cubic root of 73426 is about 41.8745310707.

The spelling of 73426 in words is "seventy-three thousand, four hundred twenty-six".