1504994221 has 2 divisors, whose sum is σ = 1504994222. Its totient is φ = 1504994220.

The previous prime is 1504994087. The next prime is 1504994251. The reversal of 1504994221 is 1224994051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1225770121 + 279224100 = 35011^2 + 16710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1504994221 - 2⁹ = 1504993709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1504994251) 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, 752497110 + 752497111.

It is an arithmetic number, because the mean of its divisors is an integer number (752497111).

Almost surely, 2^1504994221 is an apocalyptic number.

It is an amenable number.

1504994221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1504994221 is an equidigital number, since it uses as much as digits as its factorization.

1504994221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1504994221 is about 38794.2549999352. The cubic root of 1504994221 is about 1145.9832698395.

The spelling of 1504994221 in words is "one billion, five hundred four million, nine hundred ninety-four thousand, two hundred twenty-one".