858149 has 2 divisors, whose sum is σ = 858150. Its totient is φ = 858148.

The previous prime is 858127. The next prime is 858161. The reversal of 858149 is 941858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 792100 + 66049 = 890^2 + 257^2 .

It is a cyclic number.

It is not a de Polignac number, because 858149 - 2¹² = 854053 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (858749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429074 + 429075.

It is an arithmetic number, because the mean of its divisors is an integer number (429075).

2⁸⁵⁸¹⁴⁹ is an apocalyptic number.

It is an amenable number.

858149 is a deficient number, since it is larger than the sum of its proper divisors (1).

858149 is an equidigital number, since it uses as much as digits as its factorization.

858149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 35.

The square root of 858149 is about 926.3633196538. The cubic root of 858149 is about 95.0285786595.

The spelling of 858149 in words is "eight hundred fifty-eight thousand, one hundred forty-nine".