72020529 has 16 divisors (see below), whose sum is σ = 121939840. Its totient is φ = 41154480.

The previous prime is 72020519. The next prime is 72020539. The reversal of 72020529 is 92502027.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72020519) and next prime (72020539).

It is not a de Polignac number, because 72020529 - 2⁴ = 72020513 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72020519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190342 + ... + 190719.

It is an arithmetic number, because the mean of its divisors is an integer number (7621240).

Almost surely, 2^72020529 is an apocalyptic number.

It is an amenable number.

72020529 is a deficient number, since it is larger than the sum of its proper divisors (49919311).

72020529 is a wasteful number, since it uses less digits than its factorization.

72020529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381077 (or 381071 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 72020529 is about 8486.4909709491. The cubic root of 72020529 is about 416.0562997798.

The spelling of 72020529 in words is "seventy-two million, twenty thousand, five hundred twenty-nine".