115162121 has 4 divisors (see below), whose sum is σ = 115827972. Its totient is φ = 114496272.

The previous prime is 115162109. The next prime is 115162123. The reversal of 115162121 is 121261511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121261511 = 7 ⋅17323073.

It can be written as a sum of positive squares in 2 ways, for example, as 66650896 + 48511225 = 8164^2 + 6965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115162121 is a prime.

It is a super-2 number, since 2×115162121² = 26524628226437282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 115162093 and 115162102.

It is not an unprimeable number, because it can be changed into a prime (115162123) 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, 332666 + ... + 333011.

It is an arithmetic number, because the mean of its divisors is an integer number (28956993).

Almost surely, 2^115162121 is an apocalyptic number.

It is an amenable number.

115162121 is a deficient number, since it is larger than the sum of its proper divisors (665851).

115162121 is an equidigital number, since it uses as much as digits as its factorization.

115162121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665850.

The product of its digits is 120, while the sum is 20.

The square root of 115162121 is about 10731.3615631941. The cubic root of 115162121 is about 486.5228233067.

The spelling of 115162121 in words is "one hundred fifteen million, one hundred sixty-two thousand, one hundred twenty-one".