143226721 has 8 divisors (see below), whose sum is σ = 158004000. Its totient is φ = 128742240.

The previous prime is 143226703. The next prime is 143226739. The reversal of 143226721 is 127622341.

It is an interprime number because it is at equal distance from previous prime (143226703) and next prime (143226739).

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

It is not a de Polignac number, because 143226721 - 2¹³ = 143218529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143226721.

It is not an unprimeable number, because it can be changed into a prime (143226701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72171 + ... + 74128.

It is an arithmetic number, because the mean of its divisors is an integer number (19750500).

Almost surely, 2^143226721 is an apocalyptic number.

143226721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143226721 is a deficient number, since it is larger than the sum of its proper divisors (14777279).

143226721 is a wasteful number, since it uses less digits than its factorization.

143226721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146399.

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

The square root of 143226721 is about 11967.7366698971. The cubic root of 143226721 is about 523.2083701885.

The spelling of 143226721 in words is "one hundred forty-three million, two hundred twenty-six thousand, seven hundred twenty-one".