1225245 has 24 divisors (see below), whose sum is σ = 2281824. Its totient is φ = 559776.

The previous prime is 1225223. The next prime is 1225261. The reversal of 1225245 is 5425221.

It is a happy number.

It is not a de Polignac number, because 1225245 - 2⁷ = 1225117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99 + ... + 1568.

It is an arithmetic number, because the mean of its divisors is an integer number (95076).

2^1225245 is an apocalyptic number.

1225245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225245 is a deficient number, since it is larger than the sum of its proper divisors (1056579).

1225245 is a wasteful number, since it uses less digits than its factorization.

1225245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1682 counting only the distinct ones).

The product of its digits is 800, while the sum is 21.

The square root of 1225245 is about 1106.9078552436. The cubic root of 1225245 is about 107.0058808309.

The spelling of 1225245 in words is "one million, two hundred twenty-five thousand, two hundred forty-five".