1264242506 has 4 divisors (see below), whose sum is σ = 1896363762. Its totient is φ = 632121252.

The previous prime is 1264242491. The next prime is 1264242509. The reversal of 1264242506 is 6052424621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6052424621 = 5879 ⋅1029499.

It can be written as a sum of positive squares in only one way, i.e., 633780625 + 630461881 = 25175^2 + 25109^2 .

It is a super-2 number, since 2×1264242506² = 3196618227954320072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1264242509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316060625 + ... + 316060628.

Almost surely, 2^1264242506 is an apocalyptic number.

1264242506 is a deficient number, since it is larger than the sum of its proper divisors (632121256).

1264242506 is an equidigital number, since it uses as much as digits as its factorization.

1264242506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632121255.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 1264242506 is about 35556.1880127777. The cubic root of 1264242506 is about 1081.2931771725.

The spelling of 1264242506 in words is "one billion, two hundred sixty-four million, two hundred forty-two thousand, five hundred six".