1222645723 has 8 divisors (see below), whose sum is σ = 1352282288. Its totient is φ = 1098093024.

The previous prime is 1222645691. The next prime is 1222645747. The reversal of 1222645723 is 3275462221.

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 1222645723 - 2⁵ = 1222645691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222645793) 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, 1270461 + ... + 1271422.

It is an arithmetic number, because the mean of its divisors is an integer number (169035286).

Almost surely, 2^1222645723 is an apocalyptic number.

1222645723 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1222645723 is a deficient number, since it is larger than the sum of its proper divisors (129636565).

1222645723 is a wasteful number, since it uses less digits than its factorization.

1222645723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541933.

The product of its digits is 40320, while the sum is 34.

The square root of 1222645723 is about 34966.3512966395. The cubic root of 1222645723 is about 1069.3015860367.

The spelling of 1222645723 in words is "one billion, two hundred twenty-two million, six hundred forty-five thousand, seven hundred twenty-three".