1855361 has 2 divisors, whose sum is σ = 1855362. Its totient is φ = 1855360.

The previous prime is 1855349. The next prime is 1855393. The reversal of 1855361 is 1635581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1739761 + 115600 = 1319^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1855361 - 2¹⁰ = 1854337 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1855961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 927680 + 927681.

It is an arithmetic number, because the mean of its divisors is an integer number (927681).

2^1855361 is an apocalyptic number.

It is an amenable number.

1855361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1855361 is an equidigital number, since it uses as much as digits as its factorization.

1855361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 1855361 is about 1362.1163680097. The cubic root of 1855361 is about 122.8785678852.

The spelling of 1855361 in words is "one million, eight hundred fifty-five thousand, three hundred sixty-one".