1521472417 has 2 divisors, whose sum is σ = 1521472418. Its totient is φ = 1521472416.

The previous prime is 1521472361. The next prime is 1521472427. The reversal of 1521472417 is 7142741251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1434591376 + 86881041 = 37876^2 + 9321^2 .

It is an emirp because it is prime and its reverse (7142741251) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1521472417 is a prime.

It is not a weakly prime, because it can be changed into another prime (1521472427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760736208 + 760736209.

It is an arithmetic number, because the mean of its divisors is an integer number (760736209).

Almost surely, 2^1521472417 is an apocalyptic number.

It is an amenable number.

1521472417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521472417 is an equidigital number, since it uses as much as digits as its factorization.

1521472417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 34.

The square root of 1521472417 is about 39006.0561579865. The cubic root of 1521472417 is about 1150.1505579819.

The spelling of 1521472417 in words is "one billion, five hundred twenty-one million, four hundred seventy-two thousand, four hundred seventeen".