1287141 has 8 divisors (see below), whose sum is σ = 1721664. Its totient is φ = 855360.

The previous prime is 1287133. The next prime is 1287157. The reversal of 1287141 is 1417821.

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

It is not a de Polignac number, because 1287141 - 2³ = 1287133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287101) 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, 1021 + ... + 1901.

It is an arithmetic number, because the mean of its divisors is an integer number (215208).

2^1287141 is an apocalyptic number.

It is an amenable number.

1287141 is a deficient number, since it is larger than the sum of its proper divisors (434523).

1287141 is an equidigital number, since it uses as much as digits as its factorization.

1287141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371.

The product of its digits is 448, while the sum is 24.

The square root of 1287141 is about 1134.5223664609. The cubic root of 1287141 is about 108.7782434240.

It can be divided in two parts, 12 and 87141, that added together give a triangular number (87153 = T₄₁₇).

The spelling of 1287141 in words is "one million, two hundred eighty-seven thousand, one hundred forty-one".