12040621 has 2 divisors, whose sum is σ = 12040622. Its totient is φ = 12040620.

The previous prime is 12040619. The next prime is 12040631. The reversal of 12040621 is 12604021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9672100 + 2368521 = 3110^2 + 1539^2 .

It is a cyclic number.

It is not a de Polignac number, because 12040621 - 2¹ = 12040619 is a prime.

Together with 12040619, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12040595 and 12040604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12040631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6020310 + 6020311.

It is an arithmetic number, because the mean of its divisors is an integer number (6020311).

Almost surely, 2^12040621 is an apocalyptic number.

It is an amenable number.

12040621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12040621 is an equidigital number, since it uses as much as digits as its factorization.

12040621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 12040621 is about 3469.9597980380. The cubic root of 12040621 is about 229.2008877748.

Adding to 12040621 its reverse (12604021), we get a palindrome (24644642).

The spelling of 12040621 in words is "twelve million, forty thousand, six hundred twenty-one".