1212413555 has 4 divisors (see below), whose sum is σ = 1454896272. Its totient is φ = 969930840.

The previous prime is 1212413549. The next prime is 1212413557. The reversal of 1212413555 is 5553142121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1212413555 - 2⁴ = 1212413539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212413557) 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, 121241351 + ... + 121241360.

It is an arithmetic number, because the mean of its divisors is an integer number (363724068).

Almost surely, 2^1212413555 is an apocalyptic number.

1212413555 is a deficient number, since it is larger than the sum of its proper divisors (242482717).

1212413555 is an equidigital number, since it uses as much as digits as its factorization.

1212413555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242482716.

The product of its digits is 6000, while the sum is 29.

The square root of 1212413555 is about 34819.7293929749. The cubic root of 1212413555 is about 1066.3102757397.

Adding to 1212413555 its reverse (5553142121), we get a palindrome (6765555676).

The spelling of 1212413555 in words is "one billion, two hundred twelve million, four hundred thirteen thousand, five hundred fifty-five".