2167961 has 2 divisors, whose sum is σ = 2167962. Its totient is φ = 2167960.

The previous prime is 2167939. The next prime is 2167973. The reversal of 2167961 is 1697612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2157961 + 10000 = 1469^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2167961 - 2¹⁰ = 2166937 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2167261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083980 + 1083981.

It is an arithmetic number, because the mean of its divisors is an integer number (1083981).

2^2167961 is an apocalyptic number.

It is an amenable number.

2167961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2167961 is an equidigital number, since it uses as much as digits as its factorization.

2167961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 2167961 is about 1472.3997419179. The cubic root of 2167961 is about 129.4246964593.

The spelling of 2167961 in words is "two million, one hundred sixty-seven thousand, nine hundred sixty-one".