1285947 has 24 divisors (see below), whose sum is σ = 2074800. Its totient is φ = 762048.

The previous prime is 1285943. The next prime is 1285969. The reversal of 1285947 is 7495821.

It is not a de Polignac number, because 1285947 - 2² = 1285943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1285943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3204 + ... + 3582.

It is an arithmetic number, because the mean of its divisors is an integer number (86450).

2^1285947 is an apocalyptic number.

1285947 is a deficient number, since it is larger than the sum of its proper divisors (788853).

1285947 is a wasteful number, since it uses less digits than its factorization.

1285947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 424 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 1285947 is about 1133.9960317391. The cubic root of 1285947 is about 108.7445974328.

The spelling of 1285947 in words is "one million, two hundred eighty-five thousand, nine hundred forty-seven".