11421437 has 2 divisors, whose sum is σ = 11421438. Its totient is φ = 11421436.

The previous prime is 11421401. The next prime is 11421461. The reversal of 11421437 is 73412411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10310521 + 1110916 = 3211^2 + 1054^2 .

It is an emirp because it is prime and its reverse (73412411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11421437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11421037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710718 + 5710719.

It is an arithmetic number, because the mean of its divisors is an integer number (5710719).

Almost surely, 2^11421437 is an apocalyptic number.

It is an amenable number.

11421437 is a deficient number, since it is larger than the sum of its proper divisors (1).

11421437 is an equidigital number, since it uses as much as digits as its factorization.

11421437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 23.

The square root of 11421437 is about 3379.5616579669. The cubic root of 11421437 is about 225.2026947108.

Adding to 11421437 its reverse (73412411), we get a palindrome (84833848).

The spelling of 11421437 in words is "eleven million, four hundred twenty-one thousand, four hundred thirty-seven".