1287097 has 4 divisors (see below), whose sum is σ = 1470976. Its totient is φ = 1103220.

The previous prime is 1287071. The next prime is 1287101. The reversal of 1287097 is 7907821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1287097 - 2⁷ = 1286969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91929 + ... + 91942.

It is an arithmetic number, because the mean of its divisors is an integer number (367744).

2^1287097 is an apocalyptic number.

It is an amenable number.

1287097 is a deficient number, since it is larger than the sum of its proper divisors (183879).

1287097 is an equidigital number, since it uses as much as digits as its factorization.

1287097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183878.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 1287097 is about 1134.5029748749. The cubic root of 1287097 is about 108.7770039075. Note that the first 3 decimals are identical.

It can be divided in two parts, 128 and 7097, that added together give a square (7225 = 85²).

The spelling of 1287097 in words is "one million, two hundred eighty-seven thousand, ninety-seven".