1147855 has 8 divisors (see below), whose sum is σ = 1386432. Its totient is φ = 912288.

The previous prime is 1147843. The next prime is 1147889. The reversal of 1147855 is 5587411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1147855 - 2¹⁷ = 1016783 is a prime.

It is a super-2 number, since 2×1147855² = 2635142202050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202 + ... + 1528.

It is an arithmetic number, because the mean of its divisors is an integer number (173304).

2^1147855 is an apocalyptic number.

1147855 is a deficient number, since it is larger than the sum of its proper divisors (238577).

1147855 is a wasteful number, since it uses less digits than its factorization.

1147855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505.

The product of its digits is 5600, while the sum is 31.

The square root of 1147855 is about 1071.3799512778. The cubic root of 1147855 is about 104.7037758165.

It can be divided in two parts, 1147 and 855, that added together give a palindrome (2002).

The spelling of 1147855 in words is "one million, one hundred forty-seven thousand, eight hundred fifty-five".