1280487 has 8 divisors (see below), whose sum is σ = 1838704. Its totient is φ = 787968.

The previous prime is 1280473. The next prime is 1280519. The reversal of 1280487 is 7840821.

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

It is not a de Polignac number, because 1280487 - 2⁸ = 1280231 is a prime.

It is a super-3 number, since 3×1280487³ = 6298639839733383909, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280407) 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, 16378 + ... + 16455.

It is an arithmetic number, because the mean of its divisors is an integer number (229838).

2^1280487 is an apocalyptic number.

1280487 is a deficient number, since it is larger than the sum of its proper divisors (558217).

1280487 is a wasteful number, since it uses less digits than its factorization.

1280487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32849.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 1280487 is about 1131.5860550572. The cubic root of 1280487 is about 108.5904729322.

The spelling of 1280487 in words is "one million, two hundred eighty thousand, four hundred eighty-seven".