2148491 has 2 divisors, whose sum is σ = 2148492. Its totient is φ = 2148490.

The previous prime is 2148473. The next prime is 2148527. The reversal of 2148491 is 1948412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2148491 - 2¹⁴ = 2132107 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2148401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074245 + 1074246.

It is an arithmetic number, because the mean of its divisors is an integer number (1074246).

2^2148491 is an apocalyptic number.

2148491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2148491 is an equidigital number, since it uses as much as digits as its factorization.

2148491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 2148491 is about 1465.7731748125. The cubic root of 2148491 is about 129.0360854920.

The spelling of 2148491 in words is "two million, one hundred forty-eight thousand, four hundred ninety-one".