21126467 has 2 divisors, whose sum is σ = 21126468. Its totient is φ = 21126466.

The previous prime is 21126463. The next prime is 21126481. The reversal of 21126467 is 76462112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21126467 - 2² = 21126463 is a prime.

It is not a weakly prime, because it can be changed into another prime (21126463) 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, 10563233 + 10563234.

It is an arithmetic number, because the mean of its divisors is an integer number (10563234).

Almost surely, 2^21126467 is an apocalyptic number.

21126467 is a deficient number, since it is larger than the sum of its proper divisors (1).

21126467 is an equidigital number, since it uses as much as digits as its factorization.

21126467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 21126467 is about 4596.3536635033. The cubic root of 21126467 is about 276.4451395202.

Adding to 21126467 its reverse (76462112), we get a palindrome (97588579).

The spelling of 21126467 in words is "twenty-one million, one hundred twenty-six thousand, four hundred sixty-seven".