1986442 has 12 divisors (see below), whose sum is σ = 3088566. Its totient is φ = 958160.

The previous prime is 1986437. The next prime is 1986443. The reversal of 1986442 is 2446891.

It can be written as a sum of positive squares in 3 ways, for example, as 1957201 + 29241 = 1399^2 + 171^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1986398 and 1986407.

It is not an unprimeable number, because it can be changed into a prime (1986443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1092 + ... + 2272.

2^1986442 is an apocalyptic number.

1986442 is a deficient number, since it is larger than the sum of its proper divisors (1102124).

1986442 is a wasteful number, since it uses less digits than its factorization.

1986442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1212 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 1986442 is about 1409.4119341059. The cubic root of 1986442 is about 125.7067590683.

The spelling of 1986442 in words is "one million, nine hundred eighty-six thousand, four hundred forty-two".