1280494 has 4 divisors (see below), whose sum is σ = 1920744. Its totient is φ = 640246.

The previous prime is 1280473. The next prime is 1280519. The reversal of 1280494 is 4940821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4940821 = 601 ⋅8221.

It is a plaindrome in base 16.

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, 320122 + ... + 320125.

It is an arithmetic number, because the mean of its divisors is an integer number (480186).

2^1280494 is an apocalyptic number.

1280494 is a deficient number, since it is larger than the sum of its proper divisors (640250).

1280494 is an equidigital number, since it uses as much as digits as its factorization.

1280494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640249.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1280494 is about 1131.5891480568. The cubic root of 1280494 is about 108.5906708079.

It can be divided in two parts, 12804 and 94, that multiplied together give a triangular number (1203576 = T₁₅₅₁).

The spelling of 1280494 in words is "one million, two hundred eighty thousand, four hundred ninety-four".