1987146 has 48 divisors (see below), whose sum is σ = 5143680. Its totient is φ = 567000.

The previous prime is 1987127. The next prime is 1987151. The reversal of 1987146 is 6417891.

It is a self number, because there is not a number n which added to its sum of digits gives 1987146.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2271 + ... + 3021.

It is an arithmetic number, because the mean of its divisors is an integer number (107160).

2^1987146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1987146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2571840).

1987146 is an abundant number, since it is smaller than the sum of its proper divisors (3156534).

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

1987146 is a wasteful number, since it uses less digits than its factorization.

1987146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 763 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1987146 is about 1409.6616615344. The cubic root of 1987146 is about 125.7216075773.

The spelling of 1987146 in words is "one million, nine hundred eighty-seven thousand, one hundred forty-six".