72141457 has 4 divisors (see below), whose sum is σ = 73054720. Its totient is φ = 71228196.

The previous prime is 72141451. The next prime is 72141469. The reversal of 72141457 is 75414127.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72141457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72141451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456513 + ... + 456670.

It is an arithmetic number, because the mean of its divisors is an integer number (18263680).

Almost surely, 2^72141457 is an apocalyptic number.

It is an amenable number.

72141457 is a deficient number, since it is larger than the sum of its proper divisors (913263).

72141457 is an equidigital number, since it uses as much as digits as its factorization.

72141457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913262.

The product of its digits is 7840, while the sum is 31.

The square root of 72141457 is about 8493.6127178015. The cubic root of 72141457 is about 416.2890330640.

The spelling of 72141457 in words is "seventy-two million, one hundred forty-one thousand, four hundred fifty-seven".