1642768 has 10 divisors (see below), whose sum is σ = 3182894. Its totient is φ = 821376.

The previous prime is 1642741. The next prime is 1642769. The reversal of 1642768 is 8672461.

It can be written as a sum of positive squares in only one way, i.e., 1557504 + 85264 = 1248^2 + 292^2 .

It is not an unprimeable number, because it can be changed into a prime (1642769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51321 + ... + 51352.

2^1642768 is an apocalyptic number.

It is an amenable number.

1642768 is a deficient number, since it is larger than the sum of its proper divisors (1540126).

1642768 is a wasteful number, since it uses less digits than its factorization.

1642768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102681 (or 102675 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 1642768 is about 1281.7051142911. The cubic root of 1642768 is about 117.9936796385.

The spelling of 1642768 in words is "one million, six hundred forty-two thousand, seven hundred sixty-eight".