1211407 has 2 divisors, whose sum is σ = 1211408. Its totient is φ = 1211406.

The previous prime is 1211393. The next prime is 1211411. The reversal of 1211407 is 7041121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211407 - 2⁷ = 1211279 is a prime.

It is a super-3 number, since 3×1211407³ = 5333244465033708429, which contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211477) 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, 605703 + 605704.

It is an arithmetic number, because the mean of its divisors is an integer number (605704).

2^1211407 is an apocalyptic number.

1211407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211407 is an equidigital number, since it uses as much as digits as its factorization.

1211407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 1211407 is about 1100.6393596451. The cubic root of 1211407 is about 106.6015107727.

Adding to 1211407 its reverse (7041121), we get a palindrome (8252528).

The spelling of 1211407 in words is "one million, two hundred eleven thousand, four hundred seven".