72541481 has 4 divisors (see below), whose sum is σ = 73563264. Its totient is φ = 71519700.

The previous prime is 72541477. The next prime is 72541489. The reversal of 72541481 is 18414527.

It is a happy number.

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 not a de Polignac number, because 72541481 - 2² = 72541477 is a prime.

It is a super-2 number, since 2×72541481² = 10524532931346722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72541489) 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, 510785 + ... + 510926.

It is an arithmetic number, because the mean of its divisors is an integer number (18390816).

Almost surely, 2^72541481 is an apocalyptic number.

72541481 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

72541481 is a deficient number, since it is larger than the sum of its proper divisors (1021783).

72541481 is a wasteful number, since it uses less digits than its factorization.

72541481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021782.

The product of its digits is 8960, while the sum is 32.

The square root of 72541481 is about 8517.1286828367. The cubic root of 72541481 is about 417.0570554154.

The spelling of 72541481 in words is "seventy-two million, five hundred forty-one thousand, four hundred eighty-one".