1264265081 has 4 divisors (see below), whose sum is σ = 1319233152. Its totient is φ = 1209297012.

The previous prime is 1264265029. The next prime is 1264265087. The reversal of 1264265081 is 1805624621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1264265081 - 2¹⁸ = 1264002937 is a prime.

It is a super-2 number, since 2×1264265081² = 3196732390071873122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264265087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27484001 + ... + 27484046.

It is an arithmetic number, because the mean of its divisors is an integer number (329808288).

Almost surely, 2^1264265081 is an apocalyptic number.

It is an amenable number.

1264265081 is a deficient number, since it is larger than the sum of its proper divisors (54968071).

1264265081 is an equidigital number, since it uses as much as digits as its factorization.

1264265081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54968070.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1264265081 is about 35556.5054666512. The cubic root of 1264265081 is about 1081.2996131867.

The spelling of 1264265081 in words is "one billion, two hundred sixty-four million, two hundred sixty-five thousand, eighty-one".