4122091 has 4 divisors (see below), whose sum is σ = 4178632. Its totient is φ = 4065552.

The previous prime is 4122077. The next prime is 4122103. The reversal of 4122091 is 1902214.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1902214 = 2 ⋅951107.

It is a cyclic number.

It is not a de Polignac number, because 4122091 - 2¹⁷ = 3991019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4122691) 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, 28161 + ... + 28306.

It is an arithmetic number, because the mean of its divisors is an integer number (1044658).

Almost surely, 2^4122091 is an apocalyptic number.

4122091 is a deficient number, since it is larger than the sum of its proper divisors (56541).

4122091 is an equidigital number, since it uses as much as digits as its factorization.

4122091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56540.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 4122091 is about 2030.2933285612. The cubic root of 4122091 is about 160.3390077660.

The spelling of 4122091 in words is "four million, one hundred twenty-two thousand, ninety-one".