361857 has 4 divisors (see below), whose sum is σ = 482480. Its totient is φ = 241236.

The previous prime is 361843. The next prime is 361871. The reversal of 361857 is 758163.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (361843) and next prime (361871).

It is not a de Polignac number, because 361857 - 2⁶ = 361793 is a prime.

It is a D-number.

It is a Duffinian number.

361857 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 361857.

It is not an unprimeable number, because it can be changed into a prime (361807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60307 + ... + 60312.

It is an arithmetic number, because the mean of its divisors is an integer number (120620).

2³⁶¹⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

361857 is a deficient number, since it is larger than the sum of its proper divisors (120623).

361857 is a wasteful number, since it uses less digits than its factorization.

361857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120622.

The product of its digits is 5040, while the sum is 30.

The square root of 361857 is about 601.5455095003. The cubic root of 361857 is about 71.2599739808.

The spelling of 361857 in words is "three hundred sixty-one thousand, eight hundred fifty-seven".