1149555 has 16 divisors (see below), whose sum is σ = 2006784. Its totient is φ = 557280.

The previous prime is 1149539. The next prime is 1149559. The reversal of 1149555 is 5559411.

1149555 = 218² + 219² + ... + 239².

It is not a de Polignac number, because 1149555 - 2⁴ = 1149539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1149559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3319 + ... + 3648.

It is an arithmetic number, because the mean of its divisors is an integer number (125424).

2^1149555 is an apocalyptic number.

1149555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1149555 is a deficient number, since it is larger than the sum of its proper divisors (857229).

1149555 is a wasteful number, since it uses less digits than its factorization.

1149555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6986.

The product of its digits is 4500, while the sum is 30.

The square root of 1149555 is about 1072.1730270810. The cubic root of 1149555 is about 104.7554398969.

It can be divided in two parts, 114955 and 5, that added together give a triangular number (114960 = T₄₇₉).

The spelling of 1149555 in words is "one million, one hundred forty-nine thousand, five hundred fifty-five".