1218241372 has 12 divisors (see below), whose sum is σ = 2134636840. Its totient is φ = 608345136.

The previous prime is 1218241351. The next prime is 1218241393. The reversal of 1218241372 is 2731428121.

It is an interprime number because it is at equal distance from previous prime (1218241351) and next prime (1218241393).

It is a super-2 number, since 2×1218241372² = 2968224080904884768, which contains 22 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, 190347 + ... + 196642.

Almost surely, 2^1218241372 is an apocalyptic number.

It is an amenable number.

1218241372 is a deficient number, since it is larger than the sum of its proper divisors (916395468).

1218241372 is a wasteful number, since it uses less digits than its factorization.

1218241372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387780 (or 387778 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 1218241372 is about 34903.3146276969. The cubic root of 1218241372 is about 1068.0160552978.

Adding to 1218241372 its reverse (2731428121), we get a palindrome (3949669493).

The spelling of 1218241372 in words is "one billion, two hundred eighteen million, two hundred forty-one thousand, three hundred seventy-two".