1289245 has 16 divisors (see below), whose sum is σ = 1673280. Its totient is φ = 950400.

The previous prime is 1289237. The next prime is 1289261. The reversal of 1289245 is 5429821.

1289245 = T₂₃₀ + T₂₃₁ + ... + T₂₇₀.

It is not a de Polignac number, because 1289245 - 2³ = 1289237 is a prime.

1289245 is a lucky number.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3730 + ... + 4060.

It is an arithmetic number, because the mean of its divisors is an integer number (104580).

2^1289245 is an apocalyptic number.

It is an amenable number.

1289245 is a deficient number, since it is larger than the sum of its proper divisors (384035).

1289245 is a wasteful number, since it uses less digits than its factorization.

1289245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its digits is 5760, while the sum is 31.

The square root of 1289245 is about 1135.4492502970. The cubic root of 1289245 is about 108.8374819046.

The spelling of 1289245 in words is "one million, two hundred eighty-nine thousand, two hundred forty-five".