1061162261 has 4 divisors (see below), whose sum is σ = 1062928524. Its totient is φ = 1059396000.

The previous prime is 1061162251. The next prime is 1061162309. The reversal of 1061162261 is 1622611601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1622611601 = 13 ⋅124816277.

It can be written as a sum of positive squares in 2 ways, for example, as 907154161 + 154008100 = 30119^2 + 12410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061162261 - 2¹⁰ = 1061161237 is a prime.

It is a super-2 number, since 2×1061162261² = 2252130688341264242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1061162261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061162231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882230 + ... + 883431.

It is an arithmetic number, because the mean of its divisors is an integer number (265732131).

Almost surely, 2^1061162261 is an apocalyptic number.

It is an amenable number.

1061162261 is a deficient number, since it is larger than the sum of its proper divisors (1766263).

1061162261 is an equidigital number, since it uses as much as digits as its factorization.

1061162261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766262.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1061162261 is about 32575.4855834875. The cubic root of 1061162261 is about 1019.9853454898.

Adding to 1061162261 its reverse (1622611601), we get a palindrome (2683773862).

The spelling of 1061162261 in words is "one billion, sixty-one million, one hundred sixty-two thousand, two hundred sixty-one".