1225915 has 4 divisors (see below), whose sum is σ = 1471104. Its totient is φ = 980728.

The previous prime is 1225909. The next prime is 1225919. The reversal of 1225915 is 5195221.

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 1225915 - 2³ = 1225907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225915.

It is not an unprimeable number, because it can be changed into a prime (1225919) 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, 122587 + ... + 122596.

It is an arithmetic number, because the mean of its divisors is an integer number (367776).

2^1225915 is an apocalyptic number.

1225915 is a deficient number, since it is larger than the sum of its proper divisors (245189).

1225915 is an equidigital number, since it uses as much as digits as its factorization.

1225915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245188.

The product of its digits is 900, while the sum is 25.

The square root of 1225915 is about 1107.2104587656. The cubic root of 1225915 is about 107.0253819309.

The spelling of 1225915 in words is "one million, two hundred twenty-five thousand, nine hundred fifteen".