72042481 has 32 divisors (see below), whose sum is σ = 91791360. Its totient is φ = 55123200.

The previous prime is 72042479. The next prime is 72042491. The reversal of 72042481 is 18424027.

It is a cyclic number.

It is not a de Polignac number, because 72042481 - 2¹ = 72042479 is a prime.

It is a super-2 number, since 2×72042481² = 10380238137270722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72042431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217486 + ... + 217816.

It is an arithmetic number, because the mean of its divisors is an integer number (2868480).

Almost surely, 2^72042481 is an apocalyptic number.

It is an amenable number.

72042481 is a deficient number, since it is larger than the sum of its proper divisors (19748879).

72042481 is a wasteful number, since it uses less digits than its factorization.

72042481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 72042481 is about 8487.7842220452. The cubic root of 72042481 is about 416.0985670807.

The spelling of 72042481 in words is "seventy-two million, forty-two thousand, four hundred eighty-one".