1281235 has 8 divisors (see below), whose sum is σ = 1548576. Its totient is φ = 1017600.

The previous prime is 1281229. The next prime is 1281253. The reversal of 1281235 is 5321821.

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

It is a de Polignac number, because none of the positive numbers 2^k-1281235 is a prime.

It is an Ulam number.

It is a Duffinian number.

1281235 is a lucky number.

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 7 ways as a sum of consecutive naturals, for example, 94 + ... + 1603.

It is an arithmetic number, because the mean of its divisors is an integer number (193572).

2^1281235 is an apocalyptic number.

1281235 is a deficient number, since it is larger than the sum of its proper divisors (267341).

1281235 is a wasteful number, since it uses less digits than its factorization.

1281235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853.

The product of its digits is 480, while the sum is 22.

The square root of 1281235 is about 1131.9165163562. The cubic root of 1281235 is about 108.6116132907.

The spelling of 1281235 in words is "one million, two hundred eighty-one thousand, two hundred thirty-five".