1280038 has 4 divisors (see below), whose sum is σ = 1920060. Its totient is φ = 640018.

The previous prime is 1280023. The next prime is 1280101. The reversal of 1280038 is 8300821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8300821 = 251 ⋅33071.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320008 + ... + 320011.

It is an arithmetic number, because the mean of its divisors is an integer number (480015).

2^1280038 is an apocalyptic number.

1280038 is a deficient number, since it is larger than the sum of its proper divisors (640022).

1280038 is an equidigital number, since it uses as much as digits as its factorization.

1280038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640021.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1280038 is about 1131.3876435599. The cubic root of 1280038 is about 108.5777791101.

Adding to 1280038 its reverse (8300821), we get a palindrome (9580859).

The spelling of 1280038 in words is "one million, two hundred eighty thousand, thirty-eight".