1972539 has 16 divisors (see below), whose sum is σ = 2992000. Its totient is φ = 1283688.

The previous prime is 1972511. The next prime is 1972541. The reversal of 1972539 is 9352791.

It is not a de Polignac number, because 1972539 - 2⁸ = 1972283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312 + ... + 2010.

It is an arithmetic number, because the mean of its divisors is an integer number (187000).

2^1972539 is an apocalyptic number.

1972539 is a deficient number, since it is larger than the sum of its proper divisors (1019461).

1972539 is a wasteful number, since it uses less digits than its factorization.

1972539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751 (or 1745 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 1972539 is about 1404.4710748178. The cubic root of 1972539 is about 125.4128005980.

The spelling of 1972539 in words is "one million, nine hundred seventy-two thousand, five hundred thirty-nine".