2134921 has 2 divisors, whose sum is σ = 2134922. Its totient is φ = 2134920.

The previous prime is 2134879. The next prime is 2134927. The reversal of 2134921 is 1294312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2134521 + 400 = 1461^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134921 - 2⁹ = 2134409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2134892 and 2134901.

It is not a weakly prime, because it can be changed into another prime (2134927) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067460 + 1067461.

It is an arithmetic number, because the mean of its divisors is an integer number (1067461).

2^2134921 is an apocalyptic number.

It is an amenable number.

2134921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2134921 is an equidigital number, since it uses as much as digits as its factorization.

2134921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

The square root of 2134921 is about 1461.1368861267. The cubic root of 2134921 is about 128.7638449309.

The spelling of 2134921 in words is "two million, one hundred thirty-four thousand, nine hundred twenty-one".