201240039 has 64 divisors (see below), whose sum is σ = 379330560. Its totient is φ = 91393920.

The previous prime is 201240029. The next prime is 201240047. The reversal of 201240039 is 930042102.

It is not a de Polignac number, because 201240039 - 2⁸ = 201239783 is a prime.

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 = 201239997 and 201240024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201240029) 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, 55294 + ... + 58820.

It is an arithmetic number, because the mean of its divisors is an integer number (5927040).

Almost surely, 2^201240039 is an apocalyptic number.

201240039 is a deficient number, since it is larger than the sum of its proper divisors (178090521).

201240039 is a wasteful number, since it uses less digits than its factorization.

201240039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 201240039 is about 14185.9098756477. The cubic root of 201240039 is about 586.0096903040.

201240039 divided by its sum of digits (21) gives a palindrome (9582859).

The spelling of 201240039 in words is "two hundred one million, two hundred forty thousand, thirty-nine".