835440121 has 4 divisors (see below), whose sum is σ = 835501392. Its totient is φ = 835378852.

The previous prime is 835440103. The next prime is 835440191. The reversal of 835440121 is 121044538.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, 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 835440121 - 2⁹ = 835439609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 835440121.

It is not an unprimeable number, because it can be changed into a prime (835440101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90 + ... + 40876.

It is an arithmetic number, because the mean of its divisors is an integer number (208875348).

Almost surely, 2^835440121 is an apocalyptic number.

It is an amenable number.

835440121 is a deficient number, since it is larger than the sum of its proper divisors (61271).

835440121 is a wasteful number, since it uses less digits than its factorization.

835440121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61270.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 835440121 is about 28903.9810579788. The cubic root of 835440121 is about 941.8283867636.

Adding to 835440121 its reverse (121044538), we get a palindrome (956484659).

The spelling of 835440121 in words is "eight hundred thirty-five million, four hundred forty thousand, one hundred twenty-one".