1987456 has 16 divisors (see below), whose sum is σ = 3959640. Its totient is φ = 993664.

The previous prime is 1987451. The next prime is 1987471. The reversal of 1987456 is 6547891.

It is a tau number, because it is divible by the number of its divisors (16).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7636 + ... + 7891.

2^1987456 is an apocalyptic number.

1987456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1987456 is a deficient number, since it is larger than the sum of its proper divisors (1972184).

1987456 is an equidigital number, since it uses as much as digits as its factorization.

1987456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15541 (or 15529 counting only the distinct ones).

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

The square root of 1987456 is about 1409.7716127090. The cubic root of 1987456 is about 125.7281448711.

The spelling of 1987456 in words is "one million, nine hundred eighty-seven thousand, four hundred fifty-six".