1487139 has 4 divisors (see below), whose sum is σ = 1982856. Its totient is φ = 991424.

The previous prime is 1487131. The next prime is 1487159. The reversal of 1487139 is 9317841.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1487139 - 2³ = 1487131 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1487131) 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, 247854 + ... + 247859.

It is an arithmetic number, because the mean of its divisors is an integer number (495714).

2^1487139 is an apocalyptic number.

1487139 is a deficient number, since it is larger than the sum of its proper divisors (495717).

1487139 is an equidigital number, since it uses as much as digits as its factorization.

1487139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495716.

The product of its digits is 6048, while the sum is 33.

The square root of 1487139 is about 1219.4830872136. The cubic root of 1487139 is about 114.1433254240.

It can be divided in two parts, 14 and 87139, that added together give a triangular number (87153 = T₄₁₇).

The spelling of 1487139 in words is "one million, four hundred eighty-seven thousand, one hundred thirty-nine".