265040621 has 2 divisors, whose sum is σ = 265040622. Its totient is φ = 265040620.

The previous prime is 265040603. The next prime is 265040681. The reversal of 265040621 is 126040562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264062500 + 978121 = 16250^2 + 989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265040621 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 (265040681) 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, 132520310 + 132520311.

It is an arithmetic number, because the mean of its divisors is an integer number (132520311).

Almost surely, 2^265040621 is an apocalyptic number.

It is an amenable number.

265040621 is a deficient number, since it is larger than the sum of its proper divisors (1).

265040621 is an equidigital number, since it uses as much as digits as its factorization.

265040621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 265040621 is about 16280.0682123878. The cubic root of 265040621 is about 642.3486466905.

The spelling of 265040621 in words is "two hundred sixty-five million, forty thousand, six hundred twenty-one".