102000421 has 4 divisors (see below), whose sum is σ = 102085452. Its totient is φ = 101915392.

The previous prime is 102000419. The next prime is 102000433. The reversal of 102000421 is 124000201.

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 68707521 + 33292900 = 8289^2 + 5770^2 .

It is a cyclic number.

It is not a de Polignac number, because 102000421 - 2¹ = 102000419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102000398 and 102000407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102000401) 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, 40690 + ... + 43123.

It is an arithmetic number, because the mean of its divisors is an integer number (25521363).

Almost surely, 2^102000421 is an apocalyptic number.

It is an amenable number.

102000421 is a deficient number, since it is larger than the sum of its proper divisors (85031).

102000421 is an equidigital number, since it uses as much as digits as its factorization.

102000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85030.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 102000421 is about 10099.5257809464. The cubic root of 102000421 is about 467.2335156616.

Adding to 102000421 its reverse (124000201), we get a palindrome (226000622).

The spelling of 102000421 in words is "one hundred two million, four hundred twenty-one", and thus it is an aban number.