5401681 has 8 divisors (see below), whose sum is σ = 5741280. Its totient is φ = 5067648.

The previous prime is 5401661. The next prime is 5401687. The reversal of 5401681 is 1861045.

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 5401681 - 2⁷ = 5401553 is a prime.

It is a super-2 number, since 2×5401681² = 58356315251522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5401687) 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, 705 + ... + 3361.

It is an arithmetic number, because the mean of its divisors is an integer number (717660).

Almost surely, 2^5401681 is an apocalyptic number.

It is an amenable number.

5401681 is a deficient number, since it is larger than the sum of its proper divisors (339599).

5401681 is a wasteful number, since it uses less digits than its factorization.

5401681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 5401681 is about 2324.1516731917. The cubic root of 5401681 is about 175.4592671219.

The spelling of 5401681 in words is "five million, four hundred one thousand, six hundred eighty-one".