1281633 has 8 divisors (see below), whose sum is σ = 1764096. Its totient is φ = 826800.

The previous prime is 1281587. The next prime is 1281649. The reversal of 1281633 is 3361821.

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

It is not a de Polignac number, because 1281633 - 2¹⁴ = 1265249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1281653) 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, 6798 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (220512).

2^1281633 is an apocalyptic number.

It is an amenable number.

1281633 is a deficient number, since it is larger than the sum of its proper divisors (482463).

1281633 is a wasteful number, since it uses less digits than its factorization.

1281633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13815.

The product of its digits is 864, while the sum is 24.

The square root of 1281633 is about 1132.0923107238. The cubic root of 1281633 is about 108.6228584167.

The spelling of 1281633 in words is "one million, two hundred eighty-one thousand, six hundred thirty-three".