100143421 has 4 divisors (see below), whose sum is σ = 114449632. Its totient is φ = 85837212.

The previous prime is 100143397. The next prime is 100143457. The reversal of 100143421 is 124341001.

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: 124341001 = 127 ⋅979063.

It is a cyclic number.

It is not a de Polignac number, because 100143421 - 2¹³ = 100135229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100143395 and 100143404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100143521) 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, 7153095 + ... + 7153108.

It is an arithmetic number, because the mean of its divisors is an integer number (28612408).

Almost surely, 2^100143421 is an apocalyptic number.

It is an amenable number.

100143421 is a deficient number, since it is larger than the sum of its proper divisors (14306211).

100143421 is an equidigital number, since it uses as much as digits as its factorization.

100143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14306210.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 100143421 is about 10007.1684806443. The cubic root of 100143421 is about 464.3806777991.

Adding to 100143421 its reverse (124341001), we get a palindrome (224484422).

The spelling of 100143421 in words is "one hundred million, one hundred forty-three thousand, four hundred twenty-one".