1451212018 has 4 divisors (see below), whose sum is σ = 2176818030. Its totient is φ = 725606008.

The previous prime is 1451211977. The next prime is 1451212019. The reversal of 1451212018 is 8102121541.

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

It can be written as a sum of positive squares in only one way, i.e., 1440733849 + 10478169 = 37957^2 + 3237^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1451211983 and 1451212001.

It is not an unprimeable number, because it can be changed into a prime (1451212019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362803003 + ... + 362803006.

Almost surely, 2^1451212018 is an apocalyptic number.

1451212018 is a deficient number, since it is larger than the sum of its proper divisors (725606012).

1451212018 is an equidigital number, since it uses as much as digits as its factorization.

1451212018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725606011.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1451212018 is about 38094.7767810759. The cubic root of 1451212018 is about 1132.1664699804.

Adding to 1451212018 its reverse (8102121541), we get a palindrome (9553333559).

The spelling of 1451212018 in words is "one billion, four hundred fifty-one million, two hundred twelve thousand, eighteen".