1135064261 has 4 divisors (see below), whose sum is σ = 1135137024. Its totient is φ = 1134991500.

The previous prime is 1135064201. The next prime is 1135064299. The reversal of 1135064261 is 1624605311.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1624605311 = 7 ⋅232086473.

It is a cyclic number.

It is not a de Polignac number, because 1135064261 - 2¹⁸ = 1134802117 is a prime.

It is a super-2 number, since 2×1135064261² = 2576741753198952242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135064201) 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, 2405 + ... + 47706.

It is an arithmetic number, because the mean of its divisors is an integer number (283784256).

Almost surely, 2^1135064261 is an apocalyptic number.

It is an amenable number.

1135064261 is a deficient number, since it is larger than the sum of its proper divisors (72763).

1135064261 is an equidigital number, since it uses as much as digits as its factorization.

1135064261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72762.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1135064261 is about 33690.7147594111. The cubic root of 1135064261 is about 1043.1341171783.

Adding to 1135064261 its reverse (1624605311), we get a palindrome (2759669572).

The spelling of 1135064261 in words is "one billion, one hundred thirty-five million, sixty-four thousand, two hundred sixty-one".