72871001 has 4 divisors (see below), whose sum is σ = 83281152. Its totient is φ = 62460852.

The previous prime is 72870991. The next prime is 72871003. The reversal of 72871001 is 10017827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10017827 = 719 ⋅13933.

It is a cyclic number.

It is not a de Polignac number, because 72871001 - 2²⁶ = 5762137 is a prime.

It is a super-4 number, since 4×72871001⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72871003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5205065 + ... + 5205078.

It is an arithmetic number, because the mean of its divisors is an integer number (20820288).

Almost surely, 2^72871001 is an apocalyptic number.

It is an amenable number.

72871001 is a deficient number, since it is larger than the sum of its proper divisors (10410151).

72871001 is a wasteful number, since it uses less digits than its factorization.

72871001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10410150.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 72871001 is about 8536.4513118743. The cubic root of 72871001 is about 417.6875961419.

Adding to 72871001 its reverse (10017827), we get a palindrome (82888828).

The spelling of 72871001 in words is "seventy-two million, eight hundred seventy-one thousand, one".