1421775218 has 8 divisors (see below), whose sum is σ = 2132898048. Its totient is φ = 710809204.

The previous prime is 1421775217. The next prime is 1421775221. The reversal of 1421775218 is 8125771241.

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 (1421775211) 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, 13046 + ... + 54897.

It is an arithmetic number, because the mean of its divisors is an integer number (266612256).

Almost surely, 2^1421775218 is an apocalyptic number.

1421775218 is a deficient number, since it is larger than the sum of its proper divisors (711122830).

1421775218 is a wasteful number, since it uses less digits than its factorization.

1421775218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78408.

The product of its digits is 31360, while the sum is 38.

The square root of 1421775218 is about 37706.4347028461. The cubic root of 1421775218 is about 1124.4590566101.

The spelling of 1421775218 in words is "one billion, four hundred twenty-one million, seven hundred seventy-five thousand, two hundred eighteen".