1881487 has 8 divisors (see below), whose sum is σ = 1949552. Its totient is φ = 1814400.

The previous prime is 1881479. The next prime is 1881493. The reversal of 1881487 is 7841881.

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 1881487 - 2³ = 1881479 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

1881487 is an undulating number in base 15.

1881487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7687 + ... + 7927.

It is an arithmetic number, because the mean of its divisors is an integer number (243694).

2^1881487 is an apocalyptic number.

1881487 is a deficient number, since it is larger than the sum of its proper divisors (68065).

1881487 is a wasteful number, since it uses less digits than its factorization.

1881487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489.

The product of its digits is 14336, while the sum is 37.

The square root of 1881487 is about 1371.6730660037. The cubic root of 1881487 is about 123.4526473000.

The spelling of 1881487 in words is "one million, eight hundred eighty-one thousand, four hundred eighty-seven".