1648541 has 4 divisors (see below), whose sum is σ = 1745532. Its totient is φ = 1551552.

The previous prime is 1648531. The next prime is 1648553. The reversal of 1648541 is 1458461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 556516 + 1092025 = 746^2 + 1045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1648541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48470 + ... + 48503.

It is an arithmetic number, because the mean of its divisors is an integer number (436383).

2^1648541 is an apocalyptic number.

It is an amenable number.

1648541 is a deficient number, since it is larger than the sum of its proper divisors (96991).

1648541 is an equidigital number, since it uses as much as digits as its factorization.

1648541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96990.

The product of its digits is 3840, while the sum is 29.

The square root of 1648541 is about 1283.9552172876. The cubic root of 1648541 is about 118.1317354763.

The spelling of 1648541 in words is "one million, six hundred forty-eight thousand, five hundred forty-one".