1218861274 has 8 divisors (see below), whose sum is σ = 1935838548. Its totient is φ = 573581760.

The previous prime is 1218861247. The next prime is 1218861277. The reversal of 1218861274 is 4721688121.

It can be written as a sum of positive squares in 2 ways, for example, as 1110555625 + 108305649 = 33325^2 + 10407^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1218861277) 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, 17924397 + ... + 17924464.

Almost surely, 2^1218861274 is an apocalyptic number.

1218861274 is a deficient number, since it is larger than the sum of its proper divisors (716977274).

1218861274 is a wasteful number, since it uses less digits than its factorization.

1218861274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35848880.

The product of its digits is 43008, while the sum is 40.

The square root of 1218861274 is about 34912.1937723770. The cubic root of 1218861274 is about 1068.1971778675.

The spelling of 1218861274 in words is "one billion, two hundred eighteen million, eight hundred sixty-one thousand, two hundred seventy-four".