201421487 has 2 divisors, whose sum is σ = 201421488. Its totient is φ = 201421486.

The previous prime is 201421471. The next prime is 201421499. The reversal of 201421487 is 784124102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201421487 - 2⁴ = 201421471 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201421387) 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, 100710743 + 100710744.

It is an arithmetic number, because the mean of its divisors is an integer number (100710744).

Almost surely, 2^201421487 is an apocalyptic number.

201421487 is a deficient number, since it is larger than the sum of its proper divisors (1).

201421487 is an equidigital number, since it uses as much as digits as its factorization.

201421487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 201421487 is about 14192.3037946628. The cubic root of 201421487 is about 586.1857625298.

Adding to 201421487 its reverse (784124102), we get a palindrome (985545589).

The spelling of 201421487 in words is "two hundred one million, four hundred twenty-one thousand, four hundred eighty-seven".