415190921 has 2 divisors, whose sum is σ = 415190922. Its totient is φ = 415190920.

The previous prime is 415190873. The next prime is 415190927. The reversal of 415190921 is 129091514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318444025 + 96746896 = 17845^2 + 9836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-415190921 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 (415190927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207595460 + 207595461.

It is an arithmetic number, because the mean of its divisors is an integer number (207595461).

Almost surely, 2^415190921 is an apocalyptic number.

It is an amenable number.

415190921 is a deficient number, since it is larger than the sum of its proper divisors (1).

415190921 is an equidigital number, since it uses as much as digits as its factorization.

415190921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 415190921 is about 20376.2342202871. The cubic root of 415190921 is about 746.0179595185.

The spelling of 415190921 in words is "four hundred fifteen million, one hundred ninety thousand, nine hundred twenty-one".