835421 has 2 divisors, whose sum is σ = 835422. Its totient is φ = 835420.

The previous prime is 835399. The next prime is 835427. The reversal of 835421 is 124538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 835396 + 25 = 914^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 835421 - 2¹⁴ = 819037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (835427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417710 + 417711.

It is an arithmetic number, because the mean of its divisors is an integer number (417711).

2⁸³⁵⁴²¹ is an apocalyptic number.

It is an amenable number.

835421 is a deficient number, since it is larger than the sum of its proper divisors (1).

835421 is an equidigital number, since it uses as much as digits as its factorization.

835421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 835421 is about 914.0136760465. The cubic root of 835421 is about 94.1821201394.

Adding to 835421 its reverse (124538), we get a palindrome (959959).

The spelling of 835421 in words is "eight hundred thirty-five thousand, four hundred twenty-one".