1721427226 has 8 divisors (see below), whose sum is σ = 2694407904. Its totient is φ = 823291260.

The previous prime is 1721427209. The next prime is 1721427233. The reversal of 1721427226 is 6227241271.

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

It is a junction number, because it is equal to n+sod(n) for n = 1721427191 and 1721427200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18711120 + ... + 18711211.

It is an arithmetic number, because the mean of its divisors is an integer number (336800988).

Almost surely, 2^1721427226 is an apocalyptic number.

1721427226 is a deficient number, since it is larger than the sum of its proper divisors (972980678).

1721427226 is a wasteful number, since it uses less digits than its factorization.

1721427226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37422356.

The product of its digits is 18816, while the sum is 34.

The square root of 1721427226 is about 41490.0858760259. The cubic root of 1721427226 is about 1198.4765913772.

Adding to 1721427226 its reverse (6227241271), we get a palindrome (7948668497).

The spelling of 1721427226 in words is "one billion, seven hundred twenty-one million, four hundred twenty-seven thousand, two hundred twenty-six".