1202121 has 28 divisors (see below), whose sum is σ = 1928052.
Its totient is φ = 746496.
The previous prime is 1202107. The next prime is 1202129. The reversal of 1202121 is 1212021.
It can be written as a sum of positive squares in 2 ways, for example, as 746496 + 455625 = 864^2 + 675^2
It is not a de Polignac number, because 1202121 - 26 = 1202057 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1202129) 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 27 ways as a sum of consecutive naturals, for example, 12345 + ... + 12441.
It is an arithmetic number, because the mean of its divisors is an integer number (68859).
21202121 is an apocalyptic number.
It is an amenable number.
1202121 is a deficient number, since it is larger than the sum of its proper divisors (725931).
1202121 is an frugal number, since it uses more digits than its factorization.
1202121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 132 (or 117 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 9.
The square root of 1202121 is about 1096.4127872293.
The cubic root of 1202121 is about 106.3284283684.
Adding to 1202121 its reverse (1212021), we get a palindrome (2414142).
The spelling of 1202121 in words is "one million, two hundred two thousand, one hundred twenty-one".