1287957 has 16 divisors (see below), whose sum is σ = 1935360. Its totient is φ = 754800.

The previous prime is 1287947. The next prime is 1287961. The reversal of 1287957 is 7597821.

It is not a de Polignac number, because 1287957 - 2⁷ = 1287829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394 + ... + 1652.

It is an arithmetic number, because the mean of its divisors is an integer number (120960).

2^1287957 is an apocalyptic number.

It is an amenable number.

1287957 is a deficient number, since it is larger than the sum of its proper divisors (647403).

1287957 is a wasteful number, since it uses less digits than its factorization.

1287957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304.

The product of its digits is 35280, while the sum is 39.

The square root of 1287957 is about 1134.8819321850. The cubic root of 1287957 is about 108.8012257017.

The spelling of 1287957 in words is "one million, two hundred eighty-seven thousand, nine hundred fifty-seven".