1642726 has 16 divisors (see below), whose sum is σ = 2571840. Its totient is φ = 786240.

The previous prime is 1642723. The next prime is 1642741. The reversal of 1642726 is 6272461.

It is a super-2 number, since 2×1642726² = 5397097422152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1642694 and 1642703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5706 + ... + 5986.

It is an arithmetic number, because the mean of its divisors is an integer number (160740).

2^1642726 is an apocalyptic number.

1642726 is a deficient number, since it is larger than the sum of its proper divisors (929114).

1642726 is a wasteful number, since it uses less digits than its factorization.

1642726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399.

The product of its digits is 4032, while the sum is 28.

The square root of 1642726 is about 1281.6887297624. The cubic root of 1642726 is about 117.9926740640.

The spelling of 1642726 in words is "one million, six hundred forty-two thousand, seven hundred twenty-six".