12402055 has 4 divisors (see below), whose sum is σ = 14882472. Its totient is φ = 9921640.

The previous prime is 12402023. The next prime is 12402059. The reversal of 12402055 is 55020421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55020421 = 1381 ⋅39841.

It is not a de Polignac number, because 12402055 - 2⁵ = 12402023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240201 + ... + 1240210.

It is an arithmetic number, because the mean of its divisors is an integer number (3720618).

Almost surely, 2^12402055 is an apocalyptic number.

12402055 is a deficient number, since it is larger than the sum of its proper divisors (2480417).

12402055 is an equidigital number, since it uses as much as digits as its factorization.

12402055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480416.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 12402055 is about 3521.6551506358. The cubic root of 12402055 is about 231.4716909842.

Adding to 12402055 its reverse (55020421), we get a palindrome (67422476).

The spelling of 12402055 in words is "twelve million, four hundred two thousand, fifty-five".