1161510001 has 4 divisors (see below), whose sum is σ = 1201562100. Its totient is φ = 1121457904.

The previous prime is 1161509983. The next prime is 1161510011. The reversal of 1161510001 is 1000151611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1000151611 = 73 ⋅13700707.

It can be written as a sum of positive squares in 2 ways, for example, as 334890000 + 826620001 = 18300^2 + 28751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161510001 - 2¹⁹ = 1160985713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161510011) 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, 20026006 + ... + 20026063.

It is an arithmetic number, because the mean of its divisors is an integer number (300390525).

Almost surely, 2^1161510001 is an apocalyptic number.

It is an amenable number.

1161510001 is a deficient number, since it is larger than the sum of its proper divisors (40052099).

1161510001 is an equidigital number, since it uses as much as digits as its factorization.

1161510001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40052098.

The product of its (nonzero) digits is 30, while the sum is 16.

The square root of 1161510001 is about 34080.9331004889. The cubic root of 1161510001 is about 1051.1732919277.

Adding to 1161510001 its reverse (1000151611), we get a palindrome (2161661612).

The spelling of 1161510001 in words is "one billion, one hundred sixty-one million, five hundred ten thousand, one".