1987546 has 24 divisors (see below), whose sum is σ = 3370752. Its totient is φ = 877800.

The previous prime is 1987543. The next prime is 1987547. The reversal of 1987546 is 6457891.

It is a d-powerful number, because it can be written as 1 + 9 + 8⁵ + 7³ + 5⁹ + 4 + 6⁴ .

It is a junction number, because it is equal to n+sod(n) for n = 1987499 and 1987508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10311 + ... + 10501.

It is an arithmetic number, because the mean of its divisors is an integer number (140448).

2^1987546 is an apocalyptic number.

1987546 is a deficient number, since it is larger than the sum of its proper divisors (1383206).

1987546 is a wasteful number, since it uses less digits than its factorization.

1987546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 247 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 1987546 is about 1409.8035324115. The cubic root of 1987546 is about 125.7300426678.

It can be divided in two parts, 198 and 7546, that added together give a square (7744 = 88²).

The spelling of 1987546 in words is "one million, nine hundred eighty-seven thousand, five hundred forty-six".