851449 has 2 divisors, whose sum is σ = 851450. Its totient is φ = 851448.

The previous prime is 851423. The next prime is 851471. The reversal of 851449 is 944158.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 243049 = 780^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 851449 - 2⁷ = 851321 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 851449.

It is not a weakly prime, because it can be changed into another prime (851419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425724 + 425725.

It is an arithmetic number, because the mean of its divisors is an integer number (425725).

2⁸⁵¹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

851449 is a deficient number, since it is larger than the sum of its proper divisors (1).

851449 is an equidigital number, since it uses as much as digits as its factorization.

851449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

The square root of 851449 is about 922.7399416954. The cubic root of 851449 is about 94.7806202856.

The spelling of 851449 in words is "eight hundred fifty-one thousand, four hundred forty-nine".