2152691 has 2 divisors, whose sum is σ = 2152692. Its totient is φ = 2152690.

The previous prime is 2152679. The next prime is 2152729. The reversal of 2152691 is 1962512.

2152691 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 2152691 - 2¹⁸ = 1890547 is a prime.

It is a Sophie Germain prime.

It is equal to p₁₅₉₄₃₄ and since 2152691 and 159434 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2152691.

It is not a weakly prime, because it can be changed into another prime (2152621) 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, 1076345 + 1076346.

It is an arithmetic number, because the mean of its divisors is an integer number (1076346).

2^2152691 is an apocalyptic number.

2152691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152691 is an equidigital number, since it uses as much as digits as its factorization.

2152691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 2152691 is about 1467.2051662941. The cubic root of 2152691 is about 129.1201132733.

The spelling of 2152691 in words is "two million, one hundred fifty-two thousand, six hundred ninety-one".