2539961 has 2 divisors, whose sum is σ = 2539962. Its totient is φ = 2539960.

The previous prime is 2539951. The next prime is 2539963. The reversal of 2539961 is 1699352.

2539961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2383936 + 156025 = 1544^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2539961 - 2¹⁸ = 2277817 is a prime.

Together with 2539963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2539963) 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 as a sum of consecutive naturals, namely, 1269980 + 1269981.

It is an arithmetic number, because the mean of its divisors is an integer number (1269981).

2^2539961 is an apocalyptic number.

It is an amenable number.

2539961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539961 is an equidigital number, since it uses as much as digits as its factorization.

2539961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 35.

The square root of 2539961 is about 1593.7255096158. The cubic root of 2539961 is about 136.4402006531.

The spelling of 2539961 in words is "two million, five hundred thirty-nine thousand, nine hundred sixty-one".