2921131 has 2 divisors, whose sum is σ = 2921132. Its totient is φ = 2921130.

The previous prime is 2921129. The next prime is 2921137. The reversal of 2921131 is 1311292.

2921131 = T₁₃₉₄ + T₁₃₉₅ + T₁₃₉₆.

2921131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2921131 - 2¹ = 2921129 is a prime.

It is a super-2 number, since 2×2921131² = 17066012638322, which contains 22 as substring.

Together with 2921129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2921099 and 2921108.

It is not a weakly prime, because it can be changed into another prime (2921137) 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, 1460565 + 1460566.

It is an arithmetic number, because the mean of its divisors is an integer number (1460566).

2^2921131 is an apocalyptic number.

2921131 is the 1396-th centered triangular number.

2921131 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921131 is an equidigital number, since it uses as much as digits as its factorization.

2921131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 19.

The square root of 2921131 is about 1709.1316508684. The cubic root of 2921131 is about 142.9498414073.

The spelling of 2921131 in words is "two million, nine hundred twenty-one thousand, one hundred thirty-one".