1858849 has 2 divisors, whose sum is σ = 1858850. Its totient is φ = 1858848.

The previous prime is 1858823. The next prime is 1858861. The reversal of 1858849 is 9488581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1423249 + 435600 = 1193^2 + 660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1858849 - 2⁷ = 1858721 is a prime.

1858849 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1858819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 929424 + 929425.

It is an arithmetic number, because the mean of its divisors is an integer number (929425).

2^1858849 is an apocalyptic number.

It is an amenable number.

1858849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1858849 is an equidigital number, since it uses as much as digits as its factorization.

1858849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 43.

The square root of 1858849 is about 1363.3961273232. The cubic root of 1858849 is about 122.9555218475.

The spelling of 1858849 in words is "one million, eight hundred fifty-eight thousand, eight hundred forty-nine".