1224762221 has 8 divisors (see below), whose sum is σ = 1236799200. Its totient is φ = 1212771600.

The previous prime is 1224762169. The next prime is 1224762223. The reversal of 1224762221 is 1222674221.

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

It is a cyclic number.

It is not a de Polignac number, because 1224762221 - 2⁶ = 1224762157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224762223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42746 + ... + 65396.

It is an arithmetic number, because the mean of its divisors is an integer number (154599900).

Almost surely, 2^1224762221 is an apocalyptic number.

It is an amenable number.

1224762221 is a deficient number, since it is larger than the sum of its proper divisors (12036979).

1224762221 is a wasteful number, since it uses less digits than its factorization.

1224762221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23179.

The product of its digits is 5376, while the sum is 29.

The square root of 1224762221 is about 34996.6029922906. The cubic root of 1224762221 is about 1069.9182460028.

The spelling of 1224762221 in words is "one billion, two hundred twenty-four million, seven hundred sixty-two thousand, two hundred twenty-one".