1572452909 has 2 divisors, whose sum is σ = 1572452910. Its totient is φ = 1572452908.

The previous prime is 1572452851. The next prime is 1572452933. The reversal of 1572452909 is 9092542751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 830707684 + 741745225 = 28822^2 + 27235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1572452909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1572452909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1572452809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786226454 + 786226455.

It is an arithmetic number, because the mean of its divisors is an integer number (786226455).

Almost surely, 2^1572452909 is an apocalyptic number.

It is an amenable number.

1572452909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1572452909 is an equidigital number, since it uses as much as digits as its factorization.

1572452909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 1572452909 is about 39654.1663510910. The cubic root of 1572452909 is about 1162.8558519642.

The spelling of 1572452909 in words is "one billion, five hundred seventy-two million, four hundred fifty-two thousand, nine hundred nine".