1218032245 has 4 divisors (see below), whose sum is σ = 1461638700. Its totient is φ = 974425792.

The previous prime is 1218032239. The next prime is 1218032251. The reversal of 1218032245 is 5422308121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1218032239) and next prime (1218032251).

It can be written as a sum of positive squares in 2 ways, for example, as 701561169 + 516471076 = 26487^2 + 22726^2 .

It is a cyclic number.

It is not a de Polignac number, because 1218032245 - 2⁷ = 1218032117 is a prime.

It is a super-3 number, since 3×1218032245³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121803220 + ... + 121803229.

It is an arithmetic number, because the mean of its divisors is an integer number (365409675).

Almost surely, 2^1218032245 is an apocalyptic number.

It is an amenable number.

1218032245 is a deficient number, since it is larger than the sum of its proper divisors (243606455).

1218032245 is an equidigital number, since it uses as much as digits as its factorization.

1218032245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243606454.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1218032245 is about 34900.3186948200. The cubic root of 1218032245 is about 1067.9549388447.

The spelling of 1218032245 in words is "one billion, two hundred eighteen million, thirty-two thousand, two hundred forty-five".