1254504809 has 2 divisors, whose sum is σ = 1254504810. Its totient is φ = 1254504808.

The previous prime is 1254504803. The next prime is 1254504821. The reversal of 1254504809 is 9084054521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085504809 + 169000000 = 32947^2 + 13000^2 .

It is an emirp because it is prime and its reverse (9084054521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1254504809 - 2⁴ = 1254504793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1254504803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627252404 + 627252405.

It is an arithmetic number, because the mean of its divisors is an integer number (627252405).

Almost surely, 2^1254504809 is an apocalyptic number.

It is an amenable number.

1254504809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254504809 is an equidigital number, since it uses as much as digits as its factorization.

1254504809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 1254504809 is about 35418.9893842272. The cubic root of 1254504809 is about 1078.5098358482.

The spelling of 1254504809 in words is "one billion, two hundred fifty-four million, five hundred four thousand, eight hundred nine".