1221675 has 48 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 512640.

The previous prime is 1221667. The next prime is 1221707. The reversal of 1221675 is 5761221.

It is not a de Polignac number, because 1221675 - 2³ = 1221667 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6736 + ... + 6914.

It is an arithmetic number, because the mean of its divisors is an integer number (52080).

2^1221675 is an apocalyptic number.

1221675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1221675 is an abundant number, since it is smaller than the sum of its proper divisors (1278165).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221675 is a wasteful number, since it uses less digits than its factorization.

1221675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 207 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 1221675 is about 1105.2940785149. The cubic root of 1221675 is about 106.9018519445.

Adding to 1221675 its reverse (5761221), we get a palindrome (6982896).

It can be divided in two parts, 12 and 21675, that multiplied together give a square (260100 = 510²).

The spelling of 1221675 in words is "one million, two hundred twenty-one thousand, six hundred seventy-five".