1221230 has 16 divisors (see below), whose sum is σ = 2222640. Its totient is φ = 483072.

The previous prime is 1221223. The next prime is 1221239. The reversal of 1221230 is 321221.

1221230 = T₃₉₆ + T₃₉₇ + ... + T₄₁₀.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341 + ... + 1599.

It is an arithmetic number, because the mean of its divisors is an integer number (138915).

2^1221230 is an apocalyptic number.

1221230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221230 is a deficient number, since it is larger than the sum of its proper divisors (1001410).

1221230 is a wasteful number, since it uses less digits than its factorization.

1221230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1221230 is about 1105.0927562879. The cubic root of 1221230 is about 106.8888705593. Note that the first 4 decimals are identical.

Adding to 1221230 its reverse (321221), we get a palindrome (1542451).

Subtracting from 1221230 its reverse (321221), we obtain a palindrome (900009).

The spelling of 1221230 in words is "one million, two hundred twenty-one thousand, two hundred thirty".