1223994135 has 64 divisors (see below), whose sum is σ = 2552159232. Its totient is φ = 486107136.

The previous prime is 1223994133. The next prime is 1223994143. The reversal of 1223994135 is 5314993221.

1223994135 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1223994135 - 2¹ = 1223994133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1223994093 and 1223994102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223994133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3169 + ... + 49578.

It is an arithmetic number, because the mean of its divisors is an integer number (39877488).

Almost surely, 2^1223994135 is an apocalyptic number.

1223994135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1223994135 is an abundant number, since it is smaller than the sum of its proper divisors (1328165097).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223994135 is a wasteful number, since it uses less digits than its factorization.

1223994135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52792.

The product of its digits is 58320, while the sum is 39.

The square root of 1223994135 is about 34985.6275490379. The cubic root of 1223994135 is about 1069.6945397025.

The spelling of 1223994135 in words is "one billion, two hundred twenty-three million, nine hundred ninety-four thousand, one hundred thirty-five".