1284725 has 24 divisors (see below), whose sum is σ = 1770720. Its totient is φ = 918720.

The previous prime is 1284713. The next prime is 1284737. The reversal of 1284725 is 5274821.

It is an interprime number because it is at equal distance from previous prime (1284713) and next prime (1284737).

It is not a de Polignac number, because 1284725 - 2⁴ = 1284709 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19142 + ... + 19208.

It is an arithmetic number, because the mean of its divisors is an integer number (73780).

2^1284725 is an apocalyptic number.

It is an amenable number.

1284725 is a deficient number, since it is larger than the sum of its proper divisors (485995).

1284725 is a wasteful number, since it uses less digits than its factorization.

1284725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 144 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 1284725 is about 1133.4571010850. The cubic root of 1284725 is about 108.7101408512.

The spelling of 1284725 in words is "one million, two hundred eighty-four thousand, seven hundred twenty-five".