2558161 has 4 divisors (see below), whose sum is σ = 2578432. Its totient is φ = 2537892.

The previous prime is 2558137. The next prime is 2558173. The reversal of 2558161 is 1618552.

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.

It is a cyclic number.

It is not a de Polignac number, because 2558161 - 2⁹ = 2557649 is a prime.

It is a Duffinian number.

2558161 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558131) 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, 9945 + ... + 10198.

It is an arithmetic number, because the mean of its divisors is an integer number (644608).

2^2558161 is an apocalyptic number.

It is an amenable number.

2558161 is a deficient number, since it is larger than the sum of its proper divisors (20271).

2558161 is a wasteful number, since it uses less digits than its factorization.

2558161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20270.

The product of its digits is 2400, while the sum is 28.

The square root of 2558161 is about 1599.4252092549. The cubic root of 2558161 is about 136.7653111606.

The spelling of 2558161 in words is "two million, five hundred fifty-eight thousand, one hundred sixty-one".