1213427 has 2 divisors, whose sum is σ = 1213428. Its totient is φ = 1213426.

The previous prime is 1213379. The next prime is 1213439. The reversal of 1213427 is 7243121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213427 - 2¹⁸ = 951283 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213399 and 1213408.

It is not a weakly prime, because it can be changed into another prime (1213027) 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, 606713 + 606714.

It is an arithmetic number, because the mean of its divisors is an integer number (606714).

2^1213427 is an apocalyptic number.

1213427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213427 is an equidigital number, since it uses as much as digits as its factorization.

1213427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 1213427 is about 1101.5566258709. The cubic root of 1213427 is about 106.6607299213.

Adding to 1213427 its reverse (7243121), we get a palindrome (8456548).

The spelling of 1213427 in words is "one million, two hundred thirteen thousand, four hundred twenty-seven".