201494921 has 2 divisors, whose sum is σ = 201494922. Its totient is φ = 201494920.

The previous prime is 201494903. The next prime is 201494941. The reversal of 201494921 is 129494102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108160000 + 93334921 = 10400^2 + 9661^2 .

It is a cyclic number.

It is not a de Polignac number, because 201494921 - 2⁶ = 201494857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (201494941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100747460 + 100747461.

It is an arithmetic number, because the mean of its divisors is an integer number (100747461).

Almost surely, 2^201494921 is an apocalyptic number.

It is an amenable number.

201494921 is a deficient number, since it is larger than the sum of its proper divisors (1).

201494921 is an equidigital number, since it uses as much as digits as its factorization.

201494921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 201494921 is about 14194.8906653063. The cubic root of 201494921 is about 586.2569908378.

It can be divided in two parts, 20 and 1494921, that added together give a palindrome (1494941).

The spelling of 201494921 in words is "two hundred one million, four hundred ninety-four thousand, nine hundred twenty-one".