1207742818 has 4 divisors (see below), whose sum is σ = 1811614230. Its totient is φ = 603871408.

The previous prime is 1207742813. The next prime is 1207742839. The reversal of 1207742818 is 8182477021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8182477021 = 5189 ⋅1576889.

It can be written as a sum of positive squares in only one way, i.e., 697118409 + 510624409 = 26403^2 + 22597^2 .

It is a super-2 number, since 2×1207742818² = 2917285428861162248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1207742813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301935703 + ... + 301935706.

Almost surely, 2^1207742818 is an apocalyptic number.

1207742818 is a deficient number, since it is larger than the sum of its proper divisors (603871412).

1207742818 is an equidigital number, since it uses as much as digits as its factorization.

1207742818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603871411.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 1207742818 is about 34752.5944067490. The cubic root of 1207742818 is about 1064.9392187608.

The spelling of 1207742818 in words is "one billion, two hundred seven million, seven hundred forty-two thousand, eight hundred eighteen".