1229915 has 4 divisors (see below), whose sum is σ = 1475904. Its totient is φ = 983928.

The previous prime is 1229911. The next prime is 1229939. The reversal of 1229915 is 5199221.

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 1229915 - 2² = 1229911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1229911) 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, 122987 + ... + 122996.

It is an arithmetic number, because the mean of its divisors is an integer number (368976).

2^1229915 is an apocalyptic number.

1229915 is a deficient number, since it is larger than the sum of its proper divisors (245989).

1229915 is an equidigital number, since it uses as much as digits as its factorization.

1229915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245988.

The product of its digits is 1620, while the sum is 29.

The square root of 1229915 is about 1109.0153290194. The cubic root of 1229915 is about 107.1416588226.

The spelling of 1229915 in words is "one million, two hundred twenty-nine thousand, nine hundred fifteen".