851955 has 32 divisors (see below), whose sum is σ = 1560384. Its totient is φ = 393216.

The previous prime is 851953. The next prime is 851957. The reversal of 851955 is 559158.

851955 is nontrivially palindromic in base 2 and base 4.

It is an interprime number because it is at equal distance from previous prime (851953) and next prime (851957).

It is not a de Polignac number, because 851955 - 2¹ = 851953 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (851953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3187 + ... + 3443.

It is an arithmetic number, because the mean of its divisors is an integer number (48762).

2⁸⁵¹⁹⁵⁵ is an apocalyptic number.

851955 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

851955 is a deficient number, since it is larger than the sum of its proper divisors (708429).

851955 is a wasteful number, since it uses less digits than its factorization.

851955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295.

The product of its digits is 9000, while the sum is 33.

The square root of 851955 is about 923.0140843996. The cubic root of 851955 is about 94.7993920095.

The spelling of 851955 in words is "eight hundred fifty-one thousand, nine hundred fifty-five".