1149815 has 4 divisors (see below), whose sum is σ = 1379784. Its totient is φ = 919848.

The previous prime is 1149803. The next prime is 1149817. The reversal of 1149815 is 5189411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1149815 - 2⁸ = 1149559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114977 + ... + 114986.

It is an arithmetic number, because the mean of its divisors is an integer number (344946).

2^1149815 is an apocalyptic number.

1149815 is a deficient number, since it is larger than the sum of its proper divisors (229969).

1149815 is an equidigital number, since it uses as much as digits as its factorization.

1149815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229968.

The product of its digits is 1440, while the sum is 29.

The square root of 1149815 is about 1072.2942693123. The cubic root of 1149815 is about 104.7633369705.

The spelling of 1149815 in words is "one million, one hundred forty-nine thousand, eight hundred fifteen".