1241263566 has 24 divisors (see below), whose sum is σ = 2709040464. Its totient is φ = 410733600.

The previous prime is 1241263547. The next prime is 1241263579. The reversal of 1241263566 is 6653621421.

1241263566 is a `hidden beast` number, since 1 + 2 + 4 + 12 + 635 + 6 + 6 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1241263566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249210 + ... + 254141.

It is an arithmetic number, because the mean of its divisors is an integer number (112876686).

Almost surely, 2^1241263566 is an apocalyptic number.

1241263566 is an abundant number, since it is smaller than the sum of its proper divisors (1467776898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1241263566 is a wasteful number, since it uses less digits than its factorization.

1241263566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503496 (or 503493 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 1241263566 is about 35231.5705866202. The cubic root of 1241263566 is about 1074.7018653325.

Adding to 1241263566 its reverse (6653621421), we get a palindrome (7894884987).

The spelling of 1241263566 in words is "one billion, two hundred forty-one million, two hundred sixty-three thousand, five hundred sixty-six".