12055639 has 2 divisors, whose sum is σ = 12055640. Its totient is φ = 12055638.

The previous prime is 12055577. The next prime is 12055649. The reversal of 12055639 is 93655021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12055639 - 2¹³ = 12047447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12055639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12055649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6027819 + 6027820.

It is an arithmetic number, because the mean of its divisors is an integer number (6027820).

Almost surely, 2^12055639 is an apocalyptic number.

12055639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12055639 is an equidigital number, since it uses as much as digits as its factorization.

12055639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 12055639 is about 3472.1231256970. The cubic root of 12055639 is about 229.2961405811.

The spelling of 12055639 in words is "twelve million, fifty-five thousand, six hundred thirty-nine".