1202989 has 4 divisors (see below), whose sum is σ = 1205820. Its totient is φ = 1200160.

The previous prime is 1202987. The next prime is 1203019. The reversal of 1202989 is 9892021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9892021 = 43 ⋅230047.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 514089 = 830^2 + 717^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202989 - 2¹ = 1202987 is a prime.

It is a Duffinian number.

1202989 is a lucky number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1202989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202987) 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 3 ways as a sum of consecutive naturals, for example, 634 + ... + 1675.

It is an arithmetic number, because the mean of its divisors is an integer number (301455).

2^1202989 is an apocalyptic number.

It is an amenable number.

1202989 is a deficient number, since it is larger than the sum of its proper divisors (2831).

1202989 is an equidigital number, since it uses as much as digits as its factorization.

1202989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1202989 is about 1096.8085521184. The cubic root of 1202989 is about 106.3540139434.

The spelling of 1202989 in words is "one million, two hundred two thousand, nine hundred eighty-nine".