2140961 has 4 divisors (see below), whose sum is σ = 2147652. Its totient is φ = 2134272.

The previous prime is 2140937. The next prime is 2140967. The reversal of 2140961 is 1690412.

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 774400 + 1366561 = 880^2 + 1169^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140961 - 2¹⁰ = 2139937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2140967) 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, 2840 + ... + 3513.

It is an arithmetic number, because the mean of its divisors is an integer number (536913).

2^2140961 is an apocalyptic number.

It is an amenable number.

2140961 is a deficient number, since it is larger than the sum of its proper divisors (6691).

2140961 is an equidigital number, since it uses as much as digits as its factorization.

2140961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6690.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2140961 is about 1463.2023100036. The cubic root of 2140961 is about 128.8851611035.

The spelling of 2140961 in words is "two million, one hundred forty thousand, nine hundred sixty-one".