403043261 has 2 divisors, whose sum is σ = 403043262. Its totient is φ = 403043260.

The previous prime is 403043203. The next prime is 403043273. The reversal of 403043261 is 162340304.

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., 403005625 + 37636 = 20075^2 + 194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403043261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403043461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201521630 + 201521631.

It is an arithmetic number, because the mean of its divisors is an integer number (201521631).

Almost surely, 2^403043261 is an apocalyptic number.

It is an amenable number.

403043261 is a deficient number, since it is larger than the sum of its proper divisors (1).

403043261 is an equidigital number, since it uses as much as digits as its factorization.

403043261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 403043261 is about 20075.9373629228. The cubic root of 403043261 is about 738.6701590779.

Adding to 403043261 its reverse (162340304), we get a palindrome (565383565).

It can be divided in two parts, 403043 and 261, that added together give a palindrome (403304).

The spelling of 403043261 in words is "four hundred three million, forty-three thousand, two hundred sixty-one".