1225515 has 8 divisors (see below), whose sum is σ = 1960848. Its totient is φ = 653600.

The previous prime is 1225507. The next prime is 1225517. The reversal of 1225515 is 5155221.

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

It is not a de Polignac number, because 1225515 - 2³ = 1225507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1225491 and 1225500.

It is not an unprimeable number, because it can be changed into a prime (1225517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40836 + ... + 40865.

It is an arithmetic number, because the mean of its divisors is an integer number (245106).

2^1225515 is an apocalyptic number.

1225515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1225515 is a deficient number, since it is larger than the sum of its proper divisors (735333).

1225515 is an equidigital number, since it uses as much as digits as its factorization.

1225515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81709.

The product of its digits is 500, while the sum is 21.

The square root of 1225515 is about 1107.0298098967. The cubic root of 1225515 is about 107.0137403381.

The spelling of 1225515 in words is "one million, two hundred twenty-five thousand, five hundred fifteen".