2931261 has 4 divisors (see below), whose sum is σ = 3908352. Its totient is φ = 1954172.

The previous prime is 2931241. The next prime is 2931289. The reversal of 2931261 is 1621392.

Added to its reverse (1621392) it gives a triangular number (4552653 = T₃₀₁₇).

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 2931261 - 2⁶ = 2931197 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2931211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488541 + ... + 488546.

It is an arithmetic number, because the mean of its divisors is an integer number (977088).

2^2931261 is an apocalyptic number.

It is an amenable number.

2931261 is a deficient number, since it is larger than the sum of its proper divisors (977091).

2931261 is an equidigital number, since it uses as much as digits as its factorization.

2931261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977090.

The product of its digits is 648, while the sum is 24.

The square root of 2931261 is about 1712.0925792725. The cubic root of 2931261 is about 143.1148929128.

Adding to 2931261 its reverse (1621392), we get a triangular number (4552653 = T₃₀₁₇).

The spelling of 2931261 in words is "two million, nine hundred thirty-one thousand, two hundred sixty-one".