13123236 has 24 divisors (see below), whose sum is σ = 34995520. Its totient is φ = 3749472.

The previous prime is 13123219. The next prime is 13123237. The reversal of 13123236 is 63232131.

It is a super-2 number, since 2×13123236² = 344438646223392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (13123237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78031 + ... + 78198.

Almost surely, 2^13123236 is an apocalyptic number.

It is an amenable number.

13123236 is an abundant number, since it is smaller than the sum of its proper divisors (21872284).

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

13123236 is a wasteful number, since it uses less digits than its factorization.

13123236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156243 (or 156241 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 13123236 is about 3622.6007232374. The cubic root of 13123236 is about 235.8741309078.

Adding to 13123236 its reverse (63232131), we get a palindrome (76355367).

The spelling of 13123236 in words is "thirteen million, one hundred twenty-three thousand, two hundred thirty-six".