12013554 has 32 divisors (see below), whose sum is σ = 28348416. Its totient is φ = 3321360.

The previous prime is 12013553. The next prime is 12013571. The reversal of 12013554 is 45531021.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12013554.

It is not an unprimeable number, because it can be changed into a prime (12013553) 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, 3312 + ... + 5915.

It is an arithmetic number, because the mean of its divisors is an integer number (885888).

Almost surely, 2^12013554 is an apocalyptic number.

12013554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12013554 is an abundant number, since it is smaller than the sum of its proper divisors (16334862).

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

12013554 is a wasteful number, since it uses less digits than its factorization.

12013554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9270.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 12013554 is about 3466.0574144119. The cubic root of 12013554 is about 229.0290130603.

Adding to 12013554 its reverse (45531021), we get a palindrome (57544575).

The spelling of 12013554 in words is "twelve million, thirteen thousand, five hundred fifty-four".