1212919 has 2 divisors, whose sum is σ = 1212920. Its totient is φ = 1212918.

The previous prime is 1212917. The next prime is 1212923. The reversal of 1212919 is 9192121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212919 - 2¹ = 1212917 is a prime.

It is a super-2 number, since 2×1212919² = 2942345001122, which contains 22 as substring.

Together with 1212917, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1212893 and 1212902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606459 + 606460.

It is an arithmetic number, because the mean of its divisors is an integer number (606460).

2^1212919 is an apocalyptic number.

1212919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212919 is an equidigital number, since it uses as much as digits as its factorization.

1212919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 25.

The square root of 1212919 is about 1101.3260189426. The cubic root of 1212919 is about 106.6458433744.

The spelling of 1212919 in words is "one million, two hundred twelve thousand, nine hundred nineteen".