1254516409 has 2 divisors, whose sum is σ = 1254516410. Its totient is φ = 1254516408.

The previous prime is 1254516407. The next prime is 1254516449. The reversal of 1254516409 is 9046154521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 813390400 + 441126009 = 28520^2 + 21003^2 .

It is an emirp because it is prime and its reverse (9046154521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1254516409 - 2¹ = 1254516407 is a prime.

It is a super-2 number, since 2×1254516409² = 3147622840900510562, which contains 22 as substring.

Together with 1254516407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1254516407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627258204 + 627258205.

It is an arithmetic number, because the mean of its divisors is an integer number (627258205).

Almost surely, 2^1254516409 is an apocalyptic number.

It is an amenable number.

1254516409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254516409 is an equidigital number, since it uses as much as digits as its factorization.

1254516409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1254516409 is about 35419.1531378151. The cubic root of 1254516409 is about 1078.5131600484.

The spelling of 1254516409 in words is "one billion, two hundred fifty-four million, five hundred sixteen thousand, four hundred nine".