4025681 has 8 divisors (see below), whose sum is σ = 4406400. Its totient is φ = 3647440.

The previous prime is 4025657. The next prime is 4025683. The reversal of 4025681 is 1865204.

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 4025681 - 2¹⁸ = 3763537 is a prime.

It is a super-2 number, since 2×4025681² = 32412215027522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4025681.

It is not an unprimeable number, because it can be changed into a prime (4025683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5240 + ... + 5958.

It is an arithmetic number, because the mean of its divisors is an integer number (550800).

Almost surely, 2^4025681 is an apocalyptic number.

It is an amenable number.

4025681 is a deficient number, since it is larger than the sum of its proper divisors (380719).

4025681 is a wasteful number, since it uses less digits than its factorization.

4025681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 4025681 is about 2006.4099780454. The cubic root of 4025681 is about 159.0790978096.

The spelling of 4025681 in words is "four million, twenty-five thousand, six hundred eighty-one".