1405648 has 10 divisors (see below), whose sum is σ = 2723474. Its totient is φ = 702816.

The previous prime is 1405643. The next prime is 1405669. The reversal of 1405648 is 8465041.

It can be written as a sum of positive squares in only one way, i.e., 898704 + 506944 = 948^2 + 712^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43911 + ... + 43942.

2^1405648 is an apocalyptic number.

It is an amenable number.

1405648 is a deficient number, since it is larger than the sum of its proper divisors (1317826).

1405648 is an equidigital number, since it uses as much as digits as its factorization.

1405648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87861 (or 87855 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1405648 is about 1185.6002699055. The cubic root of 1405648 is about 112.0191293856.

The spelling of 1405648 in words is "one million, four hundred five thousand, six hundred forty-eight".