1218457115 has 8 divisors (see below), whose sum is σ = 1462351968. Its totient is φ = 974630080.

The previous prime is 1218457103. The next prime is 1218457151. The reversal of 1218457115 is 5117548121.

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

It is not a de Polignac number, because 1218457115 - 2¹⁶ = 1218391579 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39935 + ... + 63495.

It is an arithmetic number, because the mean of its divisors is an integer number (182793996).

Almost surely, 2^1218457115 is an apocalyptic number.

1218457115 is a deficient number, since it is larger than the sum of its proper divisors (243894853).

1218457115 is a wasteful number, since it uses less digits than its factorization.

1218457115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33909.

The product of its digits is 11200, while the sum is 35.

The square root of 1218457115 is about 34906.4050712760. The cubic root of 1218457115 is about 1068.0790979188.

The spelling of 1218457115 in words is "one billion, two hundred eighteen million, four hundred fifty-seven thousand, one hundred fifteen".