1522728461 has 2 divisors, whose sum is σ = 1522728462. Its totient is φ = 1522728460.

The previous prime is 1522728439. The next prime is 1522728469. The reversal of 1522728461 is 1648272251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 912342025 + 610386436 = 30205^2 + 24706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1522728461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1522728469) 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, 761364230 + 761364231.

It is an arithmetic number, because the mean of its divisors is an integer number (761364231).

Almost surely, 2^1522728461 is an apocalyptic number.

It is an amenable number.

1522728461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522728461 is an equidigital number, since it uses as much as digits as its factorization.

1522728461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 1522728461 is about 39022.1534644104. The cubic root of 1522728461 is about 1150.4669712876.

The spelling of 1522728461 in words is "one billion, five hundred twenty-two million, seven hundred twenty-eight thousand, four hundred sixty-one".