1165122461 has 4 divisors (see below), whose sum is σ = 1193540124. Its totient is φ = 1136704800.

The previous prime is 1165122457. The next prime is 1165122463. The reversal of 1165122461 is 1642215611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1642215611 = 419 ⋅3919369.

It can be written as a sum of positive squares in 2 ways, for example, as 146555236 + 1018567225 = 12106^2 + 31915^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165122461 - 2² = 1165122457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165122463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14208770 + ... + 14208851.

It is an arithmetic number, because the mean of its divisors is an integer number (298385031).

Almost surely, 2^1165122461 is an apocalyptic number.

It is an amenable number.

1165122461 is a deficient number, since it is larger than the sum of its proper divisors (28417663).

1165122461 is an equidigital number, since it uses as much as digits as its factorization.

1165122461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28417662.

The product of its digits is 2880, while the sum is 29.

The square root of 1165122461 is about 34133.8902119287. The cubic root of 1165122461 is about 1052.2619298558.

The spelling of 1165122461 in words is "one billion, one hundred sixty-five million, one hundred twenty-two thousand, four hundred sixty-one".