4091625 has 24 divisors (see below), whose sum is σ = 7377864. Its totient is φ = 2181600.

The previous prime is 4091621. The next prime is 4091627. The reversal of 4091625 is 5261904.

It can be written as a sum of positive squares in 4 ways, for example, as 1022121 + 3069504 = 1011^2 + 1752^2 .

It is not a de Polignac number, because 4091625 - 2² = 4091621 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (4091621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 694 + ... + 2943.

It is an arithmetic number, because the mean of its divisors is an integer number (307411).

Almost surely, 2^4091625 is an apocalyptic number.

4091625 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4091625 is a deficient number, since it is larger than the sum of its proper divisors (3286239).

4091625 is a wasteful number, since it uses less digits than its factorization.

4091625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658 (or 3645 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 4091625 is about 2022.7765571115. The cubic root of 4091625 is about 159.9430135600.

The spelling of 4091625 in words is "four million, ninety-one thousand, six hundred twenty-five".