7542939 has 4 divisors (see below), whose sum is σ = 10057256. Its totient is φ = 5028624.

The previous prime is 7542923. The next prime is 7542947. The reversal of 7542939 is 9392457.

7542939 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9392457 = 3 ⋅3130819.

It is not a de Polignac number, because 7542939 - 2⁴ = 7542923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7542897 and 7542906.

It is not an unprimeable number, because it can be changed into a prime (7542979) 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, 1257154 + ... + 1257159.

It is an arithmetic number, because the mean of its divisors is an integer number (2514314).

Almost surely, 2^7542939 is an apocalyptic number.

7542939 is a deficient number, since it is larger than the sum of its proper divisors (2514317).

7542939 is a wasteful number, since it uses less digits than its factorization.

7542939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514316.

The product of its digits is 68040, while the sum is 39.

The square root of 7542939 is about 2746.4411517453. The cubic root of 7542939 is about 196.1162280921.

The spelling of 7542939 in words is "seven million, five hundred forty-two thousand, nine hundred thirty-nine".