1165425266 has 4 divisors (see below), whose sum is σ = 1748137902. Its totient is φ = 582712632.

The previous prime is 1165425263. The next prime is 1165425277. The reversal of 1165425266 is 6625245611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6625245611 = 23 ⋅288054157.

It can be written as a sum of positive squares in only one way, i.e., 1130909641 + 34515625 = 33629^2 + 5875^2 .

It is not an unprimeable number, because it can be changed into a prime (1165425263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291356315 + ... + 291356318.

Almost surely, 2^1165425266 is an apocalyptic number.

1165425266 is a deficient number, since it is larger than the sum of its proper divisors (582712636).

1165425266 is an equidigital number, since it uses as much as digits as its factorization.

1165425266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582712635.

The product of its digits is 86400, while the sum is 38.

The square root of 1165425266 is about 34138.3254715283. The cubic root of 1165425266 is about 1052.3530798094.

The spelling of 1165425266 in words is "one billion, one hundred sixty-five million, four hundred twenty-five thousand, two hundred sixty-six".