1281245 has 8 divisors (see below), whose sum is σ = 1757184. Its totient is φ = 878544.

The previous prime is 1281229. The next prime is 1281253. The reversal of 1281245 is 5421821.

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

It is a cyclic number.

It is not a de Polignac number, because 1281245 - 2⁴ = 1281229 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1281245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18269 + ... + 18338.

It is an arithmetic number, because the mean of its divisors is an integer number (219648).

2^1281245 is an apocalyptic number.

It is an amenable number.

1281245 is a deficient number, since it is larger than the sum of its proper divisors (475939).

1281245 is an equidigital number, since it uses as much as digits as its factorization.

1281245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36619.

The product of its digits is 640, while the sum is 23.

The square root of 1281245 is about 1131.9209336345. The cubic root of 1281245 is about 108.6118958601.

The spelling of 1281245 in words is "one million, two hundred eighty-one thousand, two hundred forty-five".