143460721 has 4 divisors (see below), whose sum is σ = 144410944. Its totient is φ = 142510500.

The previous prime is 143460679. The next prime is 143460743. The reversal of 143460721 is 127064341.

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 not a de Polignac number, because 143460721 - 2⁹ = 143460209 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 143460721.

It is not an unprimeable number, because it can be changed into a prime (143460221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474885 + ... + 475186.

It is an arithmetic number, because the mean of its divisors is an integer number (36102736).

Almost surely, 2^143460721 is an apocalyptic number.

It is an amenable number.

143460721 is a deficient number, since it is larger than the sum of its proper divisors (950223).

143460721 is an equidigital number, since it uses as much as digits as its factorization.

143460721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950222.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 143460721 is about 11977.5089647222. The cubic root of 143460721 is about 523.4931497872.

The spelling of 143460721 in words is "one hundred forty-three million, four hundred sixty thousand, seven hundred twenty-one".