13123404 has 48 divisors (see below), whose sum is σ = 38886400. Its totient is φ = 3749328.

The previous prime is 13123393. The next prime is 13123423. The reversal of 13123404 is 40432131.

13123404 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

13123404 is strictly pandigital in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7924 + ... + 9435.

Almost surely, 2^13123404 is an apocalyptic number.

13123404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13123404 is an abundant number, since it is smaller than the sum of its proper divisors (25762996).

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

13123404 is a wasteful number, since it uses less digits than its factorization.

13123404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17379 (or 17371 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13123404 is about 3622.6239109242. The cubic root of 13123404 is about 235.8751374351.

Adding to 13123404 its reverse (40432131), we get a palindrome (53555535).

The spelling of 13123404 in words is "thirteen million, one hundred twenty-three thousand, four hundred four".