1240889 has 8 divisors (see below), whose sum is σ = 1362312. Its totient is φ = 1123200.

The previous prime is 1240861. The next prime is 1240931. The reversal of 1240889 is 9880421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13225 + 1227664 = 115^2 + 1108^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1240889 - 2¹⁶ = 1175353 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1240859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212 + ... + 1589.

It is an arithmetic number, because the mean of its divisors is an integer number (170289).

2^1240889 is an apocalyptic number.

It is an amenable number.

1240889 is a deficient number, since it is larger than the sum of its proper divisors (121423).

1240889 is a wasteful number, since it uses less digits than its factorization.

1240889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1240889 is about 1113.9519738301. The cubic root of 1240889 is about 107.4593753113.

The spelling of 1240889 in words is "one million, two hundred forty thousand, eight hundred eighty-nine".