1648642 has 8 divisors (see below), whose sum is σ = 2552832. Its totient is φ = 797700.

The previous prime is 1648613. The next prime is 1648697. The reversal of 1648642 is 2468461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13234 + ... + 13357.

It is an arithmetic number, because the mean of its divisors is an integer number (319104).

2^1648642 is an apocalyptic number.

1648642 is a deficient number, since it is larger than the sum of its proper divisors (904190).

1648642 is a wasteful number, since it uses less digits than its factorization.

1648642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26624.

The product of its digits is 9216, while the sum is 31.

The square root of 1648642 is about 1283.9945482750. The cubic root of 1648642 is about 118.1341479249.

The spelling of 1648642 in words is "one million, six hundred forty-eight thousand, six hundred forty-two".