1212808426 has 4 divisors (see below), whose sum is σ = 1819212642. Its totient is φ = 606404212.

The previous prime is 1212808379. The next prime is 1212808427. The reversal of 1212808426 is 6248082121.

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

It can be written as a sum of positive squares in only one way, i.e., 1212084225 + 724201 = 34815^2 + 851^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1212808391 and 1212808400.

It is not an unprimeable number, because it can be changed into a prime (1212808427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303202105 + ... + 303202108.

Almost surely, 2^1212808426 is an apocalyptic number.

1212808426 is a deficient number, since it is larger than the sum of its proper divisors (606404216).

1212808426 is an equidigital number, since it uses as much as digits as its factorization.

1212808426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606404215.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 1212808426 is about 34825.3991506199. The cubic root of 1212808426 is about 1066.4260253809.

The spelling of 1212808426 in words is "one billion, two hundred twelve million, eight hundred eight thousand, four hundred twenty-six".