4045725 has 18 divisors (see below), whose sum is σ = 7246746. Its totient is φ = 2157600.

The previous prime is 4045721. The next prime is 4045763. The reversal of 4045725 is 5275404.

It can be written as a sum of positive squares in 3 ways, for example, as 1313316 + 2732409 = 1146^2 + 1653^2 .

It is not a de Polignac number, because 4045725 - 2² = 4045721 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4045721) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8766 + ... + 9215.

It is an arithmetic number, because the mean of its divisors is an integer number (402597).

Almost surely, 2^4045725 is an apocalyptic number.

4045725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4045725 is a deficient number, since it is larger than the sum of its proper divisors (3201021).

4045725 is a wasteful number, since it uses less digits than its factorization.

4045725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17997 (or 17989 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 4045725 is about 2011.3987670276. The cubic root of 4045725 is about 159.3426808745.

The spelling of 4045725 in words is "four million, forty-five thousand, seven hundred twenty-five".