1254551819 has 2 divisors, whose sum is σ = 1254551820. Its totient is φ = 1254551818.

The previous prime is 1254551807. The next prime is 1254551821. The reversal of 1254551819 is 9181554521.

It is a strong prime.

It is an emirp because it is prime and its reverse (9181554521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1254551819 - 2¹⁶ = 1254486283 is a prime.

It is a super-2 number, since 2×1254551819² = 3147800533112417522, which contains 22 as substring.

Together with 1254551821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1254551219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627275909 + 627275910.

It is an arithmetic number, because the mean of its divisors is an integer number (627275910).

Almost surely, 2^1254551819 is an apocalyptic number.

1254551819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254551819 is an equidigital number, since it uses as much as digits as its factorization.

1254551819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 41.

The square root of 1254551819 is about 35419.6530050762. The cubic root of 1254551819 is about 1078.5233073295.

The spelling of 1254551819 in words is "one billion, two hundred fifty-four million, five hundred fifty-one thousand, eight hundred nineteen".