1987942 has 16 divisors (see below), whose sum is σ = 3286800. Its totient is φ = 894240.

The previous prime is 1987939. The next prime is 1987969. The reversal of 1987942 is 2497891.

It is a junction number, because it is equal to n+sod(n) for n = 1987895 and 1987904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1984 + ... + 2812.

It is an arithmetic number, because the mean of its divisors is an integer number (205425).

2^1987942 is an apocalyptic number.

1987942 is a deficient number, since it is larger than the sum of its proper divisors (1298858).

1987942 is a wasteful number, since it uses less digits than its factorization.

1987942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951.

The product of its digits is 36288, while the sum is 40.

The square root of 1987942 is about 1409.9439705180. The cubic root of 1987942 is about 125.7383922927.

It can be divided in two parts, 198 and 7942, that multiplied together give a square (1572516 = 1254²).

The spelling of 1987942 in words is "one million, nine hundred eighty-seven thousand, nine hundred forty-two".