1287953 has 8 divisors (see below), whose sum is σ = 1382400. Its totient is φ = 1196208.

The previous prime is 1287947. The next prime is 1287961. The reversal of 1287953 is 3597821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1287953 - 2⁸ = 1287697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368 + ... + 1646.

It is an arithmetic number, because the mean of its divisors is an integer number (172800).

2^1287953 is an apocalyptic number.

It is an amenable number.

1287953 is a deficient number, since it is larger than the sum of its proper divisors (94447).

1287953 is a wasteful number, since it uses less digits than its factorization.

1287953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its digits is 15120, while the sum is 35.

The square root of 1287953 is about 1134.8801698858. The cubic root of 1287953 is about 108.8011130671.

The spelling of 1287953 in words is "one million, two hundred eighty-seven thousand, nine hundred fifty-three".