72141021 has 12 divisors (see below), whose sum is σ = 104289120. Its totient is φ = 48054600.

The previous prime is 72141019. The next prime is 72141023. The reversal of 72141021 is 12014127.

It is an interprime number because it is at equal distance from previous prime (72141019) and next prime (72141023).

It is not a de Polignac number, because 72141021 - 2¹ = 72141019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72140985 and 72141003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72141023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12096 + ... + 17046.

It is an arithmetic number, because the mean of its divisors is an integer number (8690760).

Almost surely, 2^72141021 is an apocalyptic number.

It is an amenable number.

72141021 is a deficient number, since it is larger than the sum of its proper divisors (32148099).

72141021 is a wasteful number, since it uses less digits than its factorization.

72141021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6576 (or 6573 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 72141021 is about 8493.5870514171. The cubic root of 72141021 is about 416.2881944229.

Adding to 72141021 its reverse (12014127), we get a palindrome (84155148).

The spelling of 72141021 in words is "seventy-two million, one hundred forty-one thousand, twenty-one".