1280538 has 24 divisors (see below), whose sum is σ = 3171168. Its totient is φ = 365832.

The previous prime is 1280537. The next prime is 1280549. The reversal of 1280538 is 8350821.

It is a happy number.

1280538 is a `hidden beast` number, since 128 + 0 + 538 = 666.

It is not an unprimeable number, because it can be changed into a prime (1280537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4956 + ... + 5207.

It is an arithmetic number, because the mean of its divisors is an integer number (132132).

2^1280538 is an apocalyptic number.

1280538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1280538 is an abundant number, since it is smaller than the sum of its proper divisors (1890630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280538 is a wasteful number, since it uses less digits than its factorization.

1280538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10178 (or 10175 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1280538 is about 1131.6085895750. The cubic root of 1280538 is about 108.5919145817.

The spelling of 1280538 in words is "one million, two hundred eighty thousand, five hundred thirty-eight".