4025520 has 60 divisors (see below), whose sum is σ = 13521456. Its totient is φ = 1073280.

The previous prime is 4025507. The next prime is 4025521. The reversal of 4025520 is 255204.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×4025520² = 32409622540800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4025493 and 4025502.

It is not an unprimeable number, because it can be changed into a prime (4025521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2076 + ... + 3515.

Almost surely, 2^4025520 is an apocalyptic number.

4025520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4025520 is an abundant number, since it is smaller than the sum of its proper divisors (9495936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4025520 is a wasteful number, since it uses less digits than its factorization.

4025520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610 (or 5601 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 4025520 is about 2006.3698562329. The cubic root of 4025520 is about 159.0769770855.

The spelling of 4025520 in words is "four million, twenty-five thousand, five hundred twenty".