1543664 has 10 divisors (see below), whose sum is σ = 2990880. Its totient is φ = 771824.

The previous prime is 1543649. The next prime is 1543687. The reversal of 1543664 is 4663451.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48224 + ... + 48255.

It is an arithmetic number, because the mean of its divisors is an integer number (299088).

2^1543664 is an apocalyptic number.

It is an amenable number.

1543664 is a deficient number, since it is larger than the sum of its proper divisors (1447216).

1543664 is an equidigital number, since it uses as much as digits as its factorization.

1543664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96487 (or 96481 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 1543664 is about 1242.4427552205. The cubic root of 1543664 is about 115.5715466583.

The spelling of 1543664 in words is "one million, five hundred forty-three thousand, six hundred sixty-four".