146728441 has 4 divisors (see below), whose sum is σ = 146752884. Its totient is φ = 146704000.

The previous prime is 146728409. The next prime is 146728481. The reversal of 146728441 is 144827641.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 88435216 + 58293225 = 9404^2 + 7635^2 .

It is a cyclic number.

It is not a de Polignac number, because 146728441 - 2⁵ = 146728409 is a prime.

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 146728441.

It is not an unprimeable number, because it can be changed into a prime (146728481) 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, 3681 + ... + 17521.

It is an arithmetic number, because the mean of its divisors is an integer number (36688221).

Almost surely, 2^146728441 is an apocalyptic number.

It is an amenable number.

146728441 is a deficient number, since it is larger than the sum of its proper divisors (24443).

146728441 is a wasteful number, since it uses less digits than its factorization.

146728441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24442.

The product of its digits is 43008, while the sum is 37.

The square root of 146728441 is about 12113.1515717422. The cubic root of 146728441 is about 527.4380224122.

The spelling of 146728441 in words is "one hundred forty-six million, seven hundred twenty-eight thousand, four hundred forty-one".