1887642 has 12 divisors (see below), whose sum is σ = 4089930. Its totient is φ = 629208.

The previous prime is 1887637. The next prime is 1887643. The reversal of 1887642 is 2467881.

1887642 is a `hidden beast` number, since 1 + 8 + 8 + 7 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1718721 + 168921 = 1311^2 + 411^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1887597 and 1887606.

It is not an unprimeable number, because it can be changed into a prime (1887643) 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, 52417 + ... + 52452.

2^1887642 is an apocalyptic number.

1887642 is an abundant number, since it is smaller than the sum of its proper divisors (2202288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1887642 is a wasteful number, since it uses less digits than its factorization.

1887642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104877 (or 104874 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 1887642 is about 1373.9148445228. The cubic root of 1887642 is about 123.5871196557.

The spelling of 1887642 in words is "one million, eight hundred eighty-seven thousand, six hundred forty-two".