2501161 has 8 divisors (see below), whose sum is σ = 2705864. Its totient is φ = 2298240.

The previous prime is 2501143. The next prime is 2501171. The reversal of 2501161 is 1611052.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4761 + 2496400 = 69^2 + 1580^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2501161 - 2²¹ = 404009 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5245 + ... + 5701.

It is an arithmetic number, because the mean of its divisors is an integer number (338233).

2^2501161 is an apocalyptic number.

It is an amenable number.

2501161 is a deficient number, since it is larger than the sum of its proper divisors (204703).

2501161 is a wasteful number, since it uses less digits than its factorization.

2501161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2501161 is about 1581.5059279054. The cubic root of 2501161 is about 135.7418871707.

It can be divided in two parts, 2501 and 161, that added together give a palindrome (2662).

The spelling of 2501161 in words is "two million, five hundred one thousand, one hundred sixty-one".