401726261 has 2 divisors, whose sum is σ = 401726262. Its totient is φ = 401726260.

The previous prime is 401726243. The next prime is 401726267. The reversal of 401726261 is 162627104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 347114161 + 54612100 = 18631^2 + 7390^2 .

It is a cyclic number.

It is not a de Polignac number, because 401726261 - 2⁶ = 401726197 is a prime.

It is a super-2 number, since 2×401726261² = 322767977554080242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401726267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200863130 + 200863131.

It is an arithmetic number, because the mean of its divisors is an integer number (200863131).

Almost surely, 2^401726261 is an apocalyptic number.

It is an amenable number.

401726261 is a deficient number, since it is larger than the sum of its proper divisors (1).

401726261 is an equidigital number, since it uses as much as digits as its factorization.

401726261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 401726261 is about 20043.1100630616. The cubic root of 401726261 is about 737.8647119219.

The spelling of 401726261 in words is "four hundred one million, seven hundred twenty-six thousand, two hundred sixty-one".