1247136419 has 2 divisors, whose sum is σ = 1247136420. Its totient is φ = 1247136418.

The previous prime is 1247136409. The next prime is 1247136431. The reversal of 1247136419 is 9146317421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1247136419 - 2⁴ = 1247136403 is a prime.

It is a super-2 number, since 2×1247136419² = 3110698495192287122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1247136409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623568209 + 623568210.

It is an arithmetic number, because the mean of its divisors is an integer number (623568210).

Almost surely, 2^1247136419 is an apocalyptic number.

1247136419 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247136419 is an equidigital number, since it uses as much as digits as its factorization.

1247136419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 1247136419 is about 35314.8186884769. The cubic root of 1247136419 is about 1076.3941296380.

The spelling of 1247136419 in words is "one billion, two hundred forty-seven million, one hundred thirty-six thousand, four hundred nineteen".