1241989 has 4 divisors (see below), whose sum is σ = 1419424. Its totient is φ = 1064556.

The previous prime is 1241987. The next prime is 1242001. The reversal of 1241989 is 9891421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9891421 = 751 ⋅13171.

It is a cyclic number.

It is not a de Polignac number, because 1241989 - 2¹ = 1241987 is a prime.

It is a super-2 number, since 2×1241989² = 3085073352242, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241987) 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, 88707 + ... + 88720.

It is an arithmetic number, because the mean of its divisors is an integer number (354856).

2^1241989 is an apocalyptic number.

It is an amenable number.

1241989 is a deficient number, since it is larger than the sum of its proper divisors (177435).

1241989 is an equidigital number, since it uses as much as digits as its factorization.

1241989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177434.

The product of its digits is 5184, while the sum is 34.

The square root of 1241989 is about 1114.4456020820. The cubic root of 1241989 is about 107.4911187904.

The spelling of 1241989 in words is "one million, two hundred forty-one thousand, nine hundred eighty-nine".