1642081 has 8 divisors (see below), whose sum is σ = 1987200. Its totient is φ = 1324608.

The previous prime is 1642079. The next prime is 1642093. The reversal of 1642081 is 1802461.

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

It is a cyclic number.

It is not a de Polignac number, because 1642081 - 2¹ = 1642079 is a prime.

It is a super-2 number, since 2×1642081² = 5392860021122, which contains 22 as substring.

It is a Duffinian number.

1642081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1642021) 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, 6781 + ... + 7018.

It is an arithmetic number, because the mean of its divisors is an integer number (248400).

2^1642081 is an apocalyptic number.

It is an amenable number.

1642081 is a deficient number, since it is larger than the sum of its proper divisors (345119).

1642081 is a wasteful number, since it uses less digits than its factorization.

1642081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13823.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1642081 is about 1281.4370839023. The cubic root of 1642081 is about 117.9772291597.

The spelling of 1642081 in words is "one million, six hundred forty-two thousand, eighty-one".