2148961 has 4 divisors (see below), whose sum is σ = 2154772. Its totient is φ = 2143152.

The previous prime is 2148947. The next prime is 2148983. The reversal of 2148961 is 1698412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 938961 + 1210000 = 969^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2148961 - 2⁹ = 2148449 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2148661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2310 + ... + 3103.

It is an arithmetic number, because the mean of its divisors is an integer number (538693).

2^2148961 is an apocalyptic number.

It is an amenable number.

2148961 is a deficient number, since it is larger than the sum of its proper divisors (5811).

2148961 is an equidigital number, since it uses as much as digits as its factorization.

2148961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5810.

The product of its digits is 3456, while the sum is 31.

The square root of 2148961 is about 1465.9334909879. The cubic root of 2148961 is about 129.0454940394.

The spelling of 2148961 in words is "two million, one hundred forty-eight thousand, nine hundred sixty-one".