143294402921 has 4 divisors (see below), whose sum is σ = 143310994644. Its totient is φ = 143277811200.

The previous prime is 143294402861. The next prime is 143294402941. The reversal of 143294402921 is 129204492341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1040965696 + 142253437225 = 32264^2 + 377165^2 .

It is a cyclic number.

It is not a de Polignac number, because 143294402921 - 2¹⁰ = 143294401897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (143294402941) 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, 8282900 + ... + 8300181.

It is an arithmetic number, because the mean of its divisors is an integer number (35827748661).

Almost surely, 2^143294402921 is an apocalyptic number.

It is an amenable number.

143294402921 is a deficient number, since it is larger than the sum of its proper divisors (16591723).

143294402921 is an equidigital number, since it uses as much as digits as its factorization.

143294402921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16591722.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 143294402921 in words is "one hundred forty-three billion, two hundred ninety-four million, four hundred two thousand, nine hundred twenty-one".