1281567 has 8 divisors (see below), whose sum is σ = 1952896. Its totient is φ = 732312.

The previous prime is 1281563. The next prime is 1281587. The reversal of 1281567 is 7651821.

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

It is not a de Polignac number, because 1281567 - 2² = 1281563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30493 + ... + 30534.

It is an arithmetic number, because the mean of its divisors is an integer number (244112).

2^1281567 is an apocalyptic number.

1281567 is a deficient number, since it is larger than the sum of its proper divisors (671329).

1281567 is an equidigital number, since it uses as much as digits as its factorization.

1281567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61037.

The product of its digits is 3360, while the sum is 30.

The square root of 1281567 is about 1132.0631607821. The cubic root of 1281567 is about 108.6209938081.

The spelling of 1281567 in words is "one million, two hundred eighty-one thousand, five hundred sixty-seven".