403340261 has 2 divisors, whose sum is σ = 403340262. Its totient is φ = 403340260.

The previous prime is 403340233. The next prime is 403340269. The reversal of 403340261 is 162043304.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244328161 + 159012100 = 15631^2 + 12610^2 .

It is a cyclic number.

It is not a de Polignac number, because 403340261 - 2²⁶ = 336231397 is a prime.

It is a super-2 number, since 2×403340261² = 325366732287096242, 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 (403340269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201670130 + 201670131.

It is an arithmetic number, because the mean of its divisors is an integer number (201670131).

Almost surely, 2^403340261 is an apocalyptic number.

It is an amenable number.

403340261 is a deficient number, since it is larger than the sum of its proper divisors (1).

403340261 is an equidigital number, since it uses as much as digits as its factorization.

403340261 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 23.

The square root of 403340261 is about 20083.3329156293. The cubic root of 403340261 is about 738.8515549665.

Adding to 403340261 its reverse (162043304), we get a palindrome (565383565).

The spelling of 403340261 in words is "four hundred three million, three hundred forty thousand, two hundred sixty-one".