1223742685 has 16 divisors (see below), whose sum is σ = 1603514880. Its totient is φ = 889147840.

The previous prime is 1223742683. The next prime is 1223742721. The reversal of 1223742685 is 5862473221.

It is not a de Polignac number, because 1223742685 - 2¹ = 1223742683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223742683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50964 + ... + 71026.

It is an arithmetic number, because the mean of its divisors is an integer number (100219680).

Almost surely, 2^1223742685 is an apocalyptic number.

It is an amenable number.

1223742685 is a deficient number, since it is larger than the sum of its proper divisors (379772195).

1223742685 is a wasteful number, since it uses less digits than its factorization.

1223742685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21188.

The product of its digits is 161280, while the sum is 40.

The square root of 1223742685 is about 34982.0337459102. The cubic root of 1223742685 is about 1069.6212841465.

The spelling of 1223742685 in words is "one billion, two hundred twenty-three million, seven hundred forty-two thousand, six hundred eighty-five".