406260521 has 2 divisors, whose sum is σ = 406260522. Its totient is φ = 406260520.

The previous prime is 406260493. The next prime is 406260539. The reversal of 406260521 is 125062604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287777296 + 118483225 = 16964^2 + 10885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406260521 is a prime.

It is a super-2 number, since 2×406260521² = 330095221846382882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406260821) 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, 203130260 + 203130261.

It is an arithmetic number, because the mean of its divisors is an integer number (203130261).

Almost surely, 2^406260521 is an apocalyptic number.

It is an amenable number.

406260521 is a deficient number, since it is larger than the sum of its proper divisors (1).

406260521 is an equidigital number, since it uses as much as digits as its factorization.

406260521 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 406260521 is about 20155.9053629451. The cubic root of 406260521 is about 740.6304105689.

The spelling of 406260521 in words is "four hundred six million, two hundred sixty thousand, five hundred twenty-one".