1835861 has 2 divisors, whose sum is σ = 1835862. Its totient is φ = 1835860.

The previous prime is 1835839. The next prime is 1835863. The reversal of 1835861 is 1685381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1739761 + 96100 = 1319^2 + 310^2 .

It is an emirp because it is prime and its reverse (1685381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1835861 - 2⁶ = 1835797 is a prime.

It is a super-2 number, since 2×1835861² = 6740771222642, which contains 22 as substring.

Together with 1835863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1835863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 917930 + 917931.

It is an arithmetic number, because the mean of its divisors is an integer number (917931).

2^1835861 is an apocalyptic number.

It is an amenable number.

1835861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1835861 is an equidigital number, since it uses as much as digits as its factorization.

1835861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 1835861 is about 1354.9394820434. The cubic root of 1835861 is about 122.4465628376.

The spelling of 1835861 in words is "one million, eight hundred thirty-five thousand, eight hundred sixty-one".