265426621 has 2 divisors, whose sum is σ = 265426622. Its totient is φ = 265426620.

The previous prime is 265426591. The next prime is 265426639. The reversal of 265426621 is 126624562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219336100 + 46090521 = 14810^2 + 6789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265426621 is a prime.

It is a super-2 number, since 2×265426621² = 140902582270955282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265426691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132713310 + 132713311.

It is an arithmetic number, because the mean of its divisors is an integer number (132713311).

Almost surely, 2^265426621 is an apocalyptic number.

It is an amenable number.

265426621 is a deficient number, since it is larger than the sum of its proper divisors (1).

265426621 is an equidigital number, since it uses as much as digits as its factorization.

265426621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 34.

The square root of 265426621 is about 16291.9188863682. The cubic root of 265426621 is about 642.6603301170.

The spelling of 265426621 in words is "two hundred sixty-five million, four hundred twenty-six thousand, six hundred twenty-one".