1681401 has 8 divisors (see below), whose sum is σ = 2258784. Its totient is φ = 1112480.

The previous prime is 1681397. The next prime is 1681403. The reversal of 1681401 is 1041861.

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 1681401 - 2² = 1681397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1681403) 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, 1635 + ... + 2456.

It is an arithmetic number, because the mean of its divisors is an integer number (282348).

2^1681401 is an apocalyptic number.

It is an amenable number.

1681401 is a deficient number, since it is larger than the sum of its proper divisors (577383).

1681401 is a wasteful number, since it uses less digits than its factorization.

1681401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1681401 is about 1296.6884745381. The cubic root of 1681401 is about 118.9114752493.

The spelling of 1681401 in words is "one million, six hundred eighty-one thousand, four hundred one".