1288427 has 8 divisors (see below), whose sum is σ = 1487616. Its totient is φ = 1093032.

The previous prime is 1288423. The next prime is 1288429. The reversal of 1288427 is 7248821.

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 1288427 - 2² = 1288423 is a prime.

It is a super-3 number, since 3×1288427³ = 6416537051583331449, which contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1288393 and 1288402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288421) 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, 173 + ... + 1614.

It is an arithmetic number, because the mean of its divisors is an integer number (185952).

2^1288427 is an apocalyptic number.

1288427 is a deficient number, since it is larger than the sum of its proper divisors (199189).

1288427 is a wasteful number, since it uses less digits than its factorization.

1288427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897.

The product of its digits is 7168, while the sum is 32.

The square root of 1288427 is about 1135.0889832960. The cubic root of 1288427 is about 108.8144586375.

The spelling of 1288427 in words is "one million, two hundred eighty-eight thousand, four hundred twenty-seven".