12621042 has 64 divisors (see below), whose sum is σ = 32405760. Its totient is φ = 3566592.

The previous prime is 12621041. The next prime is 12621047. The reversal of 12621042 is 24012621.

12621042 is a `hidden beast` number, since 1 + 2 + 621 + 0 + 42 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65298 + ... + 65490.

It is an arithmetic number, because the mean of its divisors is an integer number (506340).

Almost surely, 2^12621042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12621042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16202880).

12621042 is an abundant number, since it is smaller than the sum of its proper divisors (19784718).

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

12621042 is a wasteful number, since it uses less digits than its factorization.

12621042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 12621042 is about 3552.6105894117. The cubic root of 12621042 is about 232.8261395880.

Adding to 12621042 its reverse (24012621), we get a palindrome (36633663).

It can be divided in two parts, 1262 and 1042, that added together give a square (2304 = 48²).

The spelling of 12621042 in words is "twelve million, six hundred twenty-one thousand, forty-two".