634261 has 2 divisors, whose sum is σ = 634262. Its totient is φ = 634260.

The previous prime is 634247. The next prime is 634267. The reversal of 634261 is 162436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 378225 + 256036 = 615^2 + 506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634261 is a prime.

It is a super-2 number, since 2×634261² = 804574032242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634267) 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, 317130 + 317131.

It is an arithmetic number, because the mean of its divisors is an integer number (317131).

2⁶³⁴²⁶¹ is an apocalyptic number.

It is an amenable number.

634261 is a deficient number, since it is larger than the sum of its proper divisors (1).

634261 is an equidigital number, since it uses as much as digits as its factorization.

634261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 634261 is about 796.4050476987. The cubic root of 634261 is about 85.9190241934.

Adding to 634261 its reverse (162436), we get a palindrome (796697).

The spelling of 634261 in words is "six hundred thirty-four thousand, two hundred sixty-one".