4072530 has 128 divisors (see below), whose sum is σ = 12773376. Its totient is φ = 806400.

The previous prime is 4072513. The next prime is 4072531. The reversal of 4072530 is 352704.

4072530 = T₃₅₇ + T₃₅₈ + ... + T₄₁₁.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 4072497 and 4072506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4072531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94689 + ... + 94731.

It is an arithmetic number, because the mean of its divisors is an integer number (99792).

Almost surely, 2^4072530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4072530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6386688).

4072530 is an abundant number, since it is smaller than the sum of its proper divisors (8700846).

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

4072530 is a wasteful number, since it uses less digits than its factorization.

4072530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 4072530 is about 2018.0510399888. The cubic root of 4072530 is about 159.6938154844.

It can be divided in two parts, 40725 and 30, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 4072530 in words is "four million, seventy-two thousand, five hundred thirty".