1231215419 has 8 divisors (see below), whose sum is σ = 1408205280. Its totient is φ = 1054501056.

The previous prime is 1231215413. The next prime is 1231215439. The reversal of 1231215419 is 9145121321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231215419 - 2²⁸ = 962779963 is a prime.

It is a super-2 number, since 2×1231215419² = 3031782815966691122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231215391 and 1231215400.

It is not an unprimeable number, because it can be changed into a prime (1231215413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59204 + ... + 77249.

It is an arithmetic number, because the mean of its divisors is an integer number (176025660).

Almost surely, 2^1231215419 is an apocalyptic number.

1231215419 is a deficient number, since it is larger than the sum of its proper divisors (176989861).

1231215419 is a wasteful number, since it uses less digits than its factorization.

1231215419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137749.

The product of its digits is 2160, while the sum is 29.

The square root of 1231215419 is about 35088.6793567384. The cubic root of 1231215419 is about 1071.7940668112.

The spelling of 1231215419 in words is "one billion, two hundred thirty-one million, two hundred fifteen thousand, four hundred nineteen".