259241621 has 2 divisors, whose sum is σ = 259241622. Its totient is φ = 259241620.

The previous prime is 259241611. The next prime is 259241639. The reversal of 259241621 is 126142952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244140625 + 15100996 = 15625^2 + 3886^2 .

It is a cyclic number.

It is not a de Polignac number, because 259241621 - 2¹⁴ = 259225237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259241611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129620810 + 129620811.

It is an arithmetic number, because the mean of its divisors is an integer number (129620811).

Almost surely, 2^259241621 is an apocalyptic number.

It is an amenable number.

259241621 is a deficient number, since it is larger than the sum of its proper divisors (1).

259241621 is an equidigital number, since it uses as much as digits as its factorization.

259241621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 259241621 is about 16100.9819886863. The cubic root of 259241621 is about 637.6292669302.

The spelling of 259241621 in words is "two hundred fifty-nine million, two hundred forty-one thousand, six hundred twenty-one".