1117061261 has 4 divisors (see below), whose sum is σ = 1117137024. Its totient is φ = 1116985500.

The previous prime is 1117061251. The next prime is 1117061273. The reversal of 1117061261 is 1621607111.

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: 1621607111 = 23 ⋅70504657.

It is a cyclic number.

It is not a de Polignac number, because 1117061261 - 2²² = 1112866957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1117061261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1117061221) 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, 7805 + ... + 47906.

It is an arithmetic number, because the mean of its divisors is an integer number (279284256).

Almost surely, 2^1117061261 is an apocalyptic number.

It is an amenable number.

1117061261 is a deficient number, since it is larger than the sum of its proper divisors (75763).

1117061261 is an equidigital number, since it uses as much as digits as its factorization.

1117061261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75762.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1117061261 is about 33422.4664110834. The cubic root of 1117061261 is about 1037.5897280697.

Adding to 1117061261 its reverse (1621607111), we get a palindrome (2738668372).

The spelling of 1117061261 in words is "one billion, one hundred seventeen million, sixty-one thousand, two hundred sixty-one".