202450421 has 8 divisors (see below), whose sum is σ = 215092920. Its totient is φ = 190185408.

The previous prime is 202450397. The next prime is 202450441. The reversal of 202450421 is 124054202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 124322500 + 78127921 = 11150^2 + 8839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202450421 - 2⁶ = 202450357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202450393 and 202450402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202450441) 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 7 ways as a sum of consecutive naturals, for example, 93266 + ... + 95411.

It is an arithmetic number, because the mean of its divisors is an integer number (26886615).

Almost surely, 2^202450421 is an apocalyptic number.

It is an amenable number.

202450421 is a deficient number, since it is larger than the sum of its proper divisors (12642499).

202450421 is a wasteful number, since it uses less digits than its factorization.

202450421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188743.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 202450421 is about 14228.5073356273. The cubic root of 202450421 is about 587.1822175172.

The spelling of 202450421 in words is "two hundred two million, four hundred fifty thousand, four hundred twenty-one".