143201421 has 24 divisors (see below), whose sum is σ = 238927104. Its totient is φ = 81682560.

The previous prime is 143201419. The next prime is 143201459. The reversal of 143201421 is 124102341.

143201421 is a `hidden beast` number, since 1 + 43 + 201 + 421 = 666.

It is not a de Polignac number, because 143201421 - 2¹ = 143201419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143201394 and 143201403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143201491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40861 + ... + 44226.

It is an arithmetic number, because the mean of its divisors is an integer number (9955296).

Almost surely, 2^143201421 is an apocalyptic number.

143201421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143201421 is a deficient number, since it is larger than the sum of its proper divisors (95725683).

143201421 is a wasteful number, since it uses less digits than its factorization.

143201421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85121 (or 85118 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 143201421 is about 11966.6796146634. The cubic root of 143201421 is about 523.1775613395.

Adding to 143201421 its reverse (124102341), we get a palindrome (267303762).

The spelling of 143201421 in words is "one hundred forty-three million, two hundred one thousand, four hundred twenty-one".