2549961 has 10 divisors (see below), whose sum is σ = 3809322. Its totient is φ = 1699920.

The previous prime is 2549951. The next prime is 2549993. The reversal of 2549961 is 1699452.

2549961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1587600 + 962361 = 1260^2 + 981^2 .

It is not a de Polignac number, because 2549961 - 2¹¹ = 2547913 is a prime.

It is a super-2 number, since 2×2549961² = 13004602203042, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15660 + ... + 15821.

2^2549961 is an apocalyptic number.

It is an amenable number.

2549961 is a deficient number, since it is larger than the sum of its proper divisors (1259361).

2549961 is an equidigital number, since it uses as much as digits as its factorization.

2549961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31493 (or 31484 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 2549961 is about 1596.8597308468. The cubic root of 2549961 is about 136.6190243085.

The spelling of 2549961 in words is "two million, five hundred forty-nine thousand, nine hundred sixty-one".