72541474 has 4 divisors (see below), whose sum is σ = 108812214. Its totient is φ = 36270736.

The previous prime is 72541463. The next prime is 72541477. The reversal of 72541474 is 47414527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47414527 = 6047 ⋅7841.

It can be written as a sum of positive squares in only one way, i.e., 68310225 + 4231249 = 8265^2 + 2057^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (72541477) 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 as a sum of consecutive naturals, namely, 18135367 + ... + 18135370.

Almost surely, 2^72541474 is an apocalyptic number.

72541474 is a deficient number, since it is larger than the sum of its proper divisors (36270740).

72541474 is a wasteful number, since it uses less digits than its factorization.

72541474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36270739.

The product of its digits is 31360, while the sum is 34.

The square root of 72541474 is about 8517.1282719001. The cubic root of 72541474 is about 417.0570420006.

The spelling of 72541474 in words is "seventy-two million, five hundred forty-one thousand, four hundred seventy-four".