1218256007 has 4 divisors (see below), whose sum is σ = 1219189416. Its totient is φ = 1217322600.

The previous prime is 1218255991. The next prime is 1218256021. The reversal of 1218256007 is 7006528121.

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

It is a cyclic number.

It is not a de Polignac number, because 1218256007 - 2⁴ = 1218255991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218256037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464744 + ... + 467357.

It is an arithmetic number, because the mean of its divisors is an integer number (304797354).

Almost surely, 2^1218256007 is an apocalyptic number.

1218256007 is a deficient number, since it is larger than the sum of its proper divisors (933409).

1218256007 is an equidigital number, since it uses as much as digits as its factorization.

1218256007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933408.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1218256007 is about 34903.5242776428. The cubic root of 1218256007 is about 1068.0203320508.

The spelling of 1218256007 in words is "one billion, two hundred eighteen million, two hundred fifty-six thousand, seven".