1225550 has 24 divisors (see below), whose sum is σ = 2309376. Its totient is φ = 483840.

The previous prime is 1225541. The next prime is 1225559. The reversal of 1225550 is 555221.

It is an interprime number because it is at equal distance from previous prime (1225541) and next prime (1225559).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225559) 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 11 ways as a sum of consecutive naturals, for example, 6254 + ... + 6446.

It is an arithmetic number, because the mean of its divisors is an integer number (96224).

2^1225550 is an apocalyptic number.

1225550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225550 is a deficient number, since it is larger than the sum of its proper divisors (1083826).

1225550 is a wasteful number, since it uses less digits than its factorization.

1225550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 1225550 is about 1107.0456178496. The cubic root of 1225550 is about 107.0147590786.

The spelling of 1225550 in words is "one million, two hundred twenty-five thousand, five hundred fifty".