1218480641 has 8 divisors (see below), whose sum is σ = 1397304384. Its totient is φ = 1040845680.

The previous prime is 1218480631. The next prime is 1218480643. The reversal of 1218480641 is 1460848121.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1218480641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218480643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294995 + ... + 299096.

It is an arithmetic number, because the mean of its divisors is an integer number (174663048).

Almost surely, 2^1218480641 is an apocalyptic number.

It is an amenable number.

1218480641 is a deficient number, since it is larger than the sum of its proper divisors (178823743).

1218480641 is an equidigital number, since it uses as much as digits as its factorization.

1218480641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594391.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 1218480641 is about 34906.7420565140. The cubic root of 1218480641 is about 1068.0859720404.

It can be divided in two parts, 1218480 and 641, that added together give a palindrome (1219121).

The spelling of 1218480641 in words is "one billion, two hundred eighteen million, four hundred eighty thousand, six hundred forty-one".