1212923 has 2 divisors, whose sum is σ = 1212924. Its totient is φ = 1212922.

The previous prime is 1212919. The next prime is 1212931. The reversal of 1212923 is 3292121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212923 - 2² = 1212919 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1212895 and 1212904.

It is not a weakly prime, because it can be changed into another prime (1212943) 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, 606461 + 606462.

It is an arithmetic number, because the mean of its divisors is an integer number (606462).

2^1212923 is an apocalyptic number.

1212923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212923 is an equidigital number, since it uses as much as digits as its factorization.

1212923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 1212923 is about 1101.3278349338. The cubic root of 1212923 is about 106.6459606076.

Subtracting from 1212923 its sum of digits (20), we obtain a triangular number (1212903 = T₁₅₅₇).

The spelling of 1212923 in words is "one million, two hundred twelve thousand, nine hundred twenty-three".