143407421 has 4 divisors (see below), whose sum is σ = 150955200. Its totient is φ = 135859644.

The previous prime is 143407379. The next prime is 143407423. The reversal of 143407421 is 124704341.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124704341 = 1511 ⋅82531.

It is a cyclic number.

It is not a de Polignac number, because 143407421 - 2¹⁴ = 143391037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143407423) 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 3 ways as a sum of consecutive naturals, for example, 3773861 + ... + 3773898.

It is an arithmetic number, because the mean of its divisors is an integer number (37738800).

Almost surely, 2^143407421 is an apocalyptic number.

It is an amenable number.

143407421 is a deficient number, since it is larger than the sum of its proper divisors (7547779).

143407421 is an equidigital number, since it uses as much as digits as its factorization.

143407421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7547778.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 143407421 is about 11975.2837544669. The cubic root of 143407421 is about 523.4283105734.

The spelling of 143407421 in words is "one hundred forty-three million, four hundred seven thousand, four hundred twenty-one".