1242989 has 16 divisors (see below), whose sum is σ = 1503360. Its totient is φ = 1017280.

The previous prime is 1242979. The next prime is 1242991. The reversal of 1242989 is 9892421.

It is not a de Polignac number, because 1242989 - 2¹² = 1238893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54032 + ... + 54054.

It is an arithmetic number, because the mean of its divisors is an integer number (93960).

2^1242989 is an apocalyptic number.

It is an amenable number.

1242989 is a deficient number, since it is larger than the sum of its proper divisors (260371).

1242989 is an equidigital number, since it uses as much as digits as its factorization.

1242989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 51 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 1242989 is about 1114.8941653807. The cubic root of 1242989 is about 107.5199602381.

It can be divided in two parts, 124 and 2989, that added together give a palindrome (3113).

The spelling of 1242989 in words is "one million, two hundred forty-two thousand, nine hundred eighty-nine".