1145555 has 8 divisors (see below), whose sum is σ = 1382832. Its totient is φ = 911008.

The previous prime is 1145539. The next prime is 1145593. The reversal of 1145555 is 5555411.

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 1145555 - 2⁴ = 1145539 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404 + ... + 1566.

It is an arithmetic number, because the mean of its divisors is an integer number (172854).

2^1145555 is an apocalyptic number.

1145555 is a deficient number, since it is larger than the sum of its proper divisors (237277).

1145555 is a wasteful number, since it uses less digits than its factorization.

1145555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365.

The product of its digits is 2500, while the sum is 26.

The square root of 1145555 is about 1070.3060310023. The cubic root of 1145555 is about 104.6337960980.

It can be divided in two parts, 11 and 45555, that multiplied together give a palindrome (501105).

The spelling of 1145555 in words is "one million, one hundred forty-five thousand, five hundred fifty-five".