4195921 has 2 divisors, whose sum is σ = 4195922. Its totient is φ = 4195920.

The previous prime is 4195883. The next prime is 4195937. The reversal of 4195921 is 1295914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4145296 + 50625 = 2036^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 4195921 - 2¹⁷ = 4064849 is a prime.

It is a d-powerful number, because it can be written as 4¹¹ + 1 + 9³ + 5³ + 9³ + 2⁵ + 1 .

It is not a weakly prime, because it can be changed into another prime (4195951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097960 + 2097961.

It is an arithmetic number, because the mean of its divisors is an integer number (2097961).

Almost surely, 2^4195921 is an apocalyptic number.

It is an amenable number.

4195921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4195921 is an equidigital number, since it uses as much as digits as its factorization.

4195921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 31.

The square root of 4195921 is about 2048.3947373492. The cubic root of 4195921 is about 161.2906161332.

The spelling of 4195921 in words is "four million, one hundred ninety-five thousand, nine hundred twenty-one".