72426 has 8 divisors (see below), whose sum is σ = 144864. Its totient is φ = 24140.

The previous prime is 72421. The next prime is 72431. The reversal of 72426 is 62427.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72421) and next prime (72431).

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

72426 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (72421) by changing a digit.

72426 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6030 + ... + 6041.

It is an arithmetic number, because the mean of its divisors is an integer number (18108).

2⁷²⁴²⁶ is an apocalyptic number.

72426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72432).

72426 is a wasteful number, since it uses less digits than its factorization.

72426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12076.

The product of its digits is 672, while the sum is 21.

The square root of 72426 is about 269.1207907242. The cubic root of 72426 is about 41.6835629252.

Subtracting from 72426 its reverse (62427), we obtain a palindrome (9999).

The spelling of 72426 in words is "seventy-two thousand, four hundred twenty-six".