1649002 has 4 divisors (see below), whose sum is σ = 2473506. Its totient is φ = 824500.

The previous prime is 1648987. The next prime is 1649003. The reversal of 1649002 is 2009461.

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

It can be written as a sum of positive squares in only one way, i.e., 958441 + 690561 = 979^2 + 831^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1649003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412249 + ... + 412252.

2^1649002 is an apocalyptic number.

1649002 is a deficient number, since it is larger than the sum of its proper divisors (824504).

1649002 is an equidigital number, since it uses as much as digits as its factorization.

1649002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824503.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1649002 is about 1284.1347281341. The cubic root of 1649002 is about 118.1427459505.

The spelling of 1649002 in words is "one million, six hundred forty-nine thousand, two".