972539 has 4 divisors (see below), whose sum is σ = 975024. Its totient is φ = 970056.

The previous prime is 972533. The next prime is 972557. The reversal of 972539 is 935279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935279 = 29 ⋅32251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 972499 and 972508.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 972539.

It is not an unprimeable number, because it can be changed into a prime (972533) 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, 512 + ... + 1485.

It is an arithmetic number, because the mean of its divisors is an integer number (243756).

2⁹⁷²⁵³⁹ is an apocalyptic number.

972539 is a deficient number, since it is larger than the sum of its proper divisors (2485).

972539 is a wasteful number, since it uses less digits than its factorization.

972539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484.

The product of its digits is 17010, while the sum is 35.

The square root of 972539 is about 986.1739197525. The cubic root of 972539 is about 99.0761241532.

The spelling of 972539 in words is "nine hundred seventy-two thousand, five hundred thirty-nine".