1987142 has 8 divisors (see below), whose sum is σ = 3011736. Its totient is φ = 983232.

The previous prime is 1987127. The next prime is 1987151. The reversal of 1987142 is 2417891.

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

It is a junction number, because it is equal to n+sod(n) for n = 1987099 and 1987108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4928 + ... + 5315.

It is an arithmetic number, because the mean of its divisors is an integer number (376467).

2^1987142 is an apocalyptic number.

1987142 is a deficient number, since it is larger than the sum of its proper divisors (1024594).

1987142 is a wasteful number, since it uses less digits than its factorization.

1987142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342.

The product of its digits is 4032, while the sum is 32.

The square root of 1987142 is about 1409.6602427536. The cubic root of 1987142 is about 125.7215232207.

The spelling of 1987142 in words is "one million, nine hundred eighty-seven thousand, one hundred forty-two".