2685161 has 4 divisors (see below), whose sum is σ = 2706432. Its totient is φ = 2663892.

The previous prime is 2685121. The next prime is 2685169. The reversal of 2685161 is 1615862.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1615862 = 2 ⋅807931.

It is a cyclic number.

It is not a de Polignac number, because 2685161 - 2⁶ = 2685097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2685169) 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, 10445 + ... + 10698.

It is an arithmetic number, because the mean of its divisors is an integer number (676608).

2^2685161 is an apocalyptic number.

It is an amenable number.

2685161 is a deficient number, since it is larger than the sum of its proper divisors (21271).

2685161 is a wasteful number, since it uses less digits than its factorization.

2685161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21270.

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

The square root of 2685161 is about 1638.6460874759. The cubic root of 2685161 is about 138.9920979584.

The spelling of 2685161 in words is "two million, six hundred eighty-five thousand, one hundred sixty-one".