1280493 has 12 divisors (see below), whose sum is σ = 1875900. Its totient is φ = 841536.

The previous prime is 1280473. The next prime is 1280519. The reversal of 1280493 is 3940821.

It can be written as a sum of positive squares in 2 ways, for example, as 887364 + 393129 = 942^2 + 627^2 .

It is not a de Polignac number, because 1280493 - 2¹² = 1276397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280453) 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, 318 + ... + 1631.

It is an arithmetic number, because the mean of its divisors is an integer number (156325).

2^1280493 is an apocalyptic number.

It is an amenable number.

1280493 is a deficient number, since it is larger than the sum of its proper divisors (595407).

1280493 is a wasteful number, since it uses less digits than its factorization.

1280493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028 (or 2025 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1280493 is about 1131.5887062003. The cubic root of 1280493 is about 108.5906425400.

The spelling of 1280493 in words is "one million, two hundred eighty thousand, four hundred ninety-three".