202419421 has 2 divisors, whose sum is σ = 202419422. Its totient is φ = 202419420.

The previous prime is 202419401. The next prime is 202419439. The reversal of 202419421 is 124914202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131354521 + 71064900 = 11461^2 + 8430^2 .

It is a cyclic number.

It is not a de Polignac number, because 202419421 - 2¹³ = 202411229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202419401) 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 as a sum of consecutive naturals, namely, 101209710 + 101209711.

It is an arithmetic number, because the mean of its divisors is an integer number (101209711).

Almost surely, 2^202419421 is an apocalyptic number.

It is an amenable number.

202419421 is a deficient number, since it is larger than the sum of its proper divisors (1).

202419421 is an equidigital number, since it uses as much as digits as its factorization.

202419421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 202419421 is about 14227.4179315855. The cubic root of 202419421 is about 587.1522454417.

The spelling of 202419421 in words is "two hundred two million, four hundred nineteen thousand, four hundred twenty-one".