1212641423 has 4 divisors (see below), whose sum is σ = 1385875920. Its totient is φ = 1039406928.

The previous prime is 1212641411. The next prime is 1212641449. The reversal of 1212641423 is 3241462121.

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

It is not a de Polignac number, because 1212641423 - 2¹⁰ = 1212640399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212641392 and 1212641401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212631423) 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, 86617238 + ... + 86617251.

It is an arithmetic number, because the mean of its divisors is an integer number (346468980).

Almost surely, 2^1212641423 is an apocalyptic number.

1212641423 is a deficient number, since it is larger than the sum of its proper divisors (173234497).

1212641423 is an equidigital number, since it uses as much as digits as its factorization.

1212641423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173234496.

The product of its digits is 2304, while the sum is 26.

The square root of 1212641423 is about 34823.0013496827. The cubic root of 1212641423 is about 1066.3770743906.

The spelling of 1212641423 in words is "one billion, two hundred twelve million, six hundred forty-one thousand, four hundred twenty-three".