1162161001 has 4 divisors (see below), whose sum is σ = 1162322500. Its totient is φ = 1161999504.

The previous prime is 1162160983. The next prime is 1162161017. The reversal of 1162161001 is 1001612611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1001612611 = 821 ⋅1219991.

It can be written as a sum of positive squares in 2 ways, for example, as 1048205376 + 113955625 = 32376^2 + 10675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1162161001 - 2²³ = 1153772393 is a prime.

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 1162161001.

It is not an unprimeable number, because it can be changed into a prime (1162161041) 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, 69426 + ... + 84523.

It is an arithmetic number, because the mean of its divisors is an integer number (290580625).

Almost surely, 2^1162161001 is an apocalyptic number.

It is an amenable number.

1162161001 is a deficient number, since it is larger than the sum of its proper divisors (161499).

1162161001 is an equidigital number, since it uses as much as digits as its factorization.

1162161001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161498.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1162161001 is about 34090.4825574529. The cubic root of 1162161001 is about 1051.3696415085.

Adding to 1162161001 its reverse (1001612611), we get a palindrome (2163773612).

The spelling of 1162161001 in words is "one billion, one hundred sixty-two million, one hundred sixty-one thousand, one".