1228515 has 8 divisors (see below), whose sum is σ = 1965648. Its totient is φ = 655200.

The previous prime is 1228501. The next prime is 1228519. The reversal of 1228515 is 5158221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1228515 - 2¹⁰ = 1227491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40936 + ... + 40965.

It is an arithmetic number, because the mean of its divisors is an integer number (245706).

2^1228515 is an apocalyptic number.

1228515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1228515 is a deficient number, since it is larger than the sum of its proper divisors (737133).

1228515 is an equidigital number, since it uses as much as digits as its factorization.

1228515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81909.

The product of its digits is 800, while the sum is 24.

The square root of 1228515 is about 1108.3839587435. The cubic root of 1228515 is about 107.1009906267.

The spelling of 1228515 in words is "one million, two hundred twenty-eight thousand, five hundred fifteen".