72040001 has 16 divisors (see below), whose sum is σ = 85401600. Its totient is φ = 60037200.

The previous prime is 72039983. The next prime is 72040013. The reversal of 72040001 is 10004027.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72040001 - 2¹⁸ = 71777857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72040061) 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, 920 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (5337600).

Almost surely, 2^72040001 is an apocalyptic number.

It is an amenable number.

72040001 is a deficient number, since it is larger than the sum of its proper divisors (13361599).

72040001 is a wasteful number, since it uses less digits than its factorization.

72040001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11180.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 72040001 is about 8487.6381284784. The cubic root of 72040001 is about 416.0937924150.

Adding to 72040001 its reverse (10004027), we get a palindrome (82044028).

The spelling of 72040001 in words is "seventy-two million, forty thousand, one".