260153921 has 2 divisors, whose sum is σ = 260153922. Its totient is φ = 260153920.

The previous prime is 260153917. The next prime is 260153981. The reversal of 260153921 is 129351062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222159025 + 37994896 = 14905^2 + 6164^2 .

It is a cyclic number.

It is not a de Polignac number, because 260153921 - 2² = 260153917 is a prime.

It is a super-2 number, since 2×260153921² = 135360125223348482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (260153981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130076960 + 130076961.

It is an arithmetic number, because the mean of its divisors is an integer number (130076961).

Almost surely, 2^260153921 is an apocalyptic number.

It is an amenable number.

260153921 is a deficient number, since it is larger than the sum of its proper divisors (1).

260153921 is an equidigital number, since it uses as much as digits as its factorization.

260153921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 260153921 is about 16129.2876780098. The cubic root of 260153921 is about 638.3763539432.

The spelling of 260153921 in words is "two hundred sixty million, one hundred fifty-three thousand, nine hundred twenty-one".