4135891 has 4 divisors (see below), whose sum is σ = 4141000. Its totient is φ = 4130784.

The previous prime is 4135889. The next prime is 4135907. The reversal of 4135891 is 1985314.

4135891 = T₁₆₅₉ + T₁₆₆₀ + T₁₆₆₁.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4135891 - 2¹ = 4135889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4135591) 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, 1041 + ... + 3058.

It is an arithmetic number, because the mean of its divisors is an integer number (1035250).

Almost surely, 2^4135891 is an apocalyptic number.

4135891 is the 1661-st centered triangular number.

4135891 is a deficient number, since it is larger than the sum of its proper divisors (5109).

4135891 is a wasteful number, since it uses less digits than its factorization.

4135891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108.

The product of its digits is 4320, while the sum is 31.

The square root of 4135891 is about 2033.6890126074. The cubic root of 4135891 is about 160.5177369334.

The spelling of 4135891 in words is "four million, one hundred thirty-five thousand, eight hundred ninety-one".