4125681 has 32 divisors (see below), whose sum is σ = 7096320. Its totient is φ = 2320272.

The previous prime is 4125677. The next prime is 4125691. The reversal of 4125681 is 1865214.

4125681 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 4125681 - 2² = 4125677 is a prime.

It is a super-2 number, since 2×4125681² = 34042487427522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

4125681 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4125601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15556 + ... + 15818.

It is an arithmetic number, because the mean of its divisors is an integer number (221760).

Almost surely, 2^4125681 is an apocalyptic number.

It is an amenable number.

4125681 is a deficient number, since it is larger than the sum of its proper divisors (2970639).

4125681 is a wasteful number, since it uses less digits than its factorization.

4125681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 356 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 4125681 is about 2031.1772448509. The cubic root of 4125681 is about 160.3855415935.

The spelling of 4125681 in words is "four million, one hundred twenty-five thousand, six hundred eighty-one".