72542039 has 4 divisors (see below), whose sum is σ = 73624824. Its totient is φ = 71459256.

The previous prime is 72542027. The next prime is 72542051. The reversal of 72542039 is 93024527.

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: 93024527 = 17 ⋅5472031.

It is an interprime number because it is at equal distance from previous prime (72542027) and next prime (72542051).

It is a cyclic number.

It is not a de Polignac number, because 72542039 - 2¹² = 72537943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72541996 and 72542014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72542339) 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, 541292 + ... + 541425.

It is an arithmetic number, because the mean of its divisors is an integer number (18406206).

Almost surely, 2^72542039 is an apocalyptic number.

72542039 is a deficient number, since it is larger than the sum of its proper divisors (1082785).

72542039 is a wasteful number, since it uses less digits than its factorization.

72542039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082784.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 72542039 is about 8517.1614402922. The cubic root of 72542039 is about 417.0581247679.

The spelling of 72542039 in words is "seventy-two million, five hundred forty-two thousand, thirty-nine".