260620621 has 2 divisors, whose sum is σ = 260620622. Its totient is φ = 260620620.

The previous prime is 260620597. The next prime is 260620669. The reversal of 260620621 is 126026062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177555625 + 83064996 = 13325^2 + 9114^2 .

It is a cyclic number.

It is not a de Polignac number, because 260620621 - 2¹⁵ = 260587853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260620681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130310310 + 130310311.

It is an arithmetic number, because the mean of its divisors is an integer number (130310311).

Almost surely, 2^260620621 is an apocalyptic number.

It is an amenable number.

260620621 is a deficient number, since it is larger than the sum of its proper divisors (1).

260620621 is an equidigital number, since it uses as much as digits as its factorization.

260620621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 260620621 is about 16143.7486662795. The cubic root of 260620621 is about 638.7578617629.

Adding to 260620621 its reverse (126026062), we get a palindrome (386646683).

The spelling of 260620621 in words is "two hundred sixty million, six hundred twenty thousand, six hundred twenty-one".