1221410 has 16 divisors (see below), whose sum is σ = 2232576.
Its totient is φ = 481008.
The previous prime is 1221391. The next prime is 1221421. The reversal of 1221410 is 141221.
It is a junction number, because it is equal to n+sod(n) for n = 1221391 and 1221400.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242 + ... + 1581.
It is an arithmetic number, because the mean of its divisors is an integer number (139536).
21221410 is an apocalyptic number.
1221410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
1221410 is a deficient number, since it is larger than the sum of its proper divisors (1011166).
1221410 is a wasteful number, since it uses less digits than its factorization.
1221410 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1897.
The product of its (nonzero) digits is 16, while the sum is 11.
The square root of 1221410 is about 1105.1741944146.
The cubic root of 1221410 is about 106.8941218365.
Adding to 1221410 its reverse (141221), we get a palindrome (1362631).
The spelling of 1221410 in words is "one million, two hundred twenty-one thousand, four hundred ten".