1221402 has 32 divisors (see below), whose sum is σ = 3007872. Its totient is φ = 321984.

The previous prime is 1221391. The next prime is 1221421. The reversal of 1221402 is 2041221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573 + ... + 1664.

It is an arithmetic number, because the mean of its divisors is an integer number (93996).

2^1221402 is an apocalyptic number.

1221402 is an abundant number, since it is smaller than the sum of its proper divisors (1786470).

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

1221402 is a wasteful number, since it uses less digits than its factorization.

1221402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1221402 is about 1105.1705750697. The cubic root of 1221402 is about 106.8938884573.

Adding to 1221402 its reverse (2041221), we get a palindrome (3262623).

The spelling of 1221402 in words is "one million, two hundred twenty-one thousand, four hundred two".