1115649 has 12 divisors (see below), whose sum is σ = 1627236. Its totient is φ = 736512.

The previous prime is 1115641. The next prime is 1115657. The reversal of 1115649 is 9465111.

1115649 is a `hidden beast` number, since 1 + 1 + 15 + 649 = 666.

It is an interprime number because it is at equal distance from previous prime (1115641) and next prime (1115657).

It can be written as a sum of positive squares in 2 ways, for example, as 129600 + 986049 = 360^2 + 993^2 .

It is not a de Polignac number, because 1115649 - 2³ = 1115641 is a prime.

1115649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1115641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 469 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (135603).

2^1115649 is an apocalyptic number.

It is an amenable number.

1115649 is a deficient number, since it is larger than the sum of its proper divisors (511587).

1115649 is a wasteful number, since it uses less digits than its factorization.

1115649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216 (or 1213 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 1115649 is about 1056.2428697984. The cubic root of 1115649 is about 103.7152281017.

It can be divided in two parts, 1115 and 649, that added together give a square (1764 = 42²).

The spelling of 1115649 in words is "one million, one hundred fifteen thousand, six hundred forty-nine".