1000505266 has 4 divisors (see below), whose sum is σ = 1500757902. Its totient is φ = 500252632.

The previous prime is 1000505263. The next prime is 1000505269. The reversal of 1000505266 is 6625050001.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1000505263) and next prime (1000505269).

It can be written as a sum of positive squares in only one way, i.e., 572884225 + 427621041 = 23935^2 + 20679^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1000505266.

It is not an unprimeable number, because it can be changed into a prime (1000505263) 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, 250126315 + ... + 250126318.

Almost surely, 2^1000505266 is an apocalyptic number.

1000505266 is a deficient number, since it is larger than the sum of its proper divisors (500252636).

1000505266 is an equidigital number, since it uses as much as digits as its factorization.

1000505266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500252635.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1000505266 is about 31630.7645497228. The cubic root of 1000505266 is about 1000.1683936420.

Adding to 1000505266 its reverse (6625050001), we get a palindrome (7625555267).

The spelling of 1000505266 in words is "one billion, five hundred five thousand, two hundred sixty-six".