264127421 has 2 divisors, whose sum is σ = 264127422. Its totient is φ = 264127420.

The previous prime is 264127403. The next prime is 264127433. The reversal of 264127421 is 124721462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235622500 + 28504921 = 15350^2 + 5339^2 .

It is a cyclic number.

It is not a de Polignac number, because 264127421 - 2²² = 259933117 is a prime.

It is a super-2 number, since 2×264127421² = 139526589048222482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264127441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132063710 + 132063711.

It is an arithmetic number, because the mean of its divisors is an integer number (132063711).

Almost surely, 2^264127421 is an apocalyptic number.

It is an amenable number.

264127421 is a deficient number, since it is larger than the sum of its proper divisors (1).

264127421 is an equidigital number, since it uses as much as digits as its factorization.

264127421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 29.

The square root of 264127421 is about 16251.9974464679. The cubic root of 264127421 is about 641.6100582958.

Adding to 264127421 its reverse (124721462), we get a palindrome (388848883).

It can be divided in two parts, 26412 and 7421, that added together give a palindrome (33833).

The spelling of 264127421 in words is "two hundred sixty-four million, one hundred twenty-seven thousand, four hundred twenty-one".