7542739 has 4 divisors (see below), whose sum is σ = 7564824. Its totient is φ = 7520656.

The previous prime is 7542727. The next prime is 7542749. The reversal of 7542739 is 9372457.

7542739 is digitally balanced in base 3, 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: 9372457 = 17 ⋅551321.

It is a cyclic number.

It is not a de Polignac number, because 7542739 - 2⁵ = 7542707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7542698 and 7542707.

It is not an unprimeable number, because it can be changed into a prime (7542719) 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, 10522 + ... + 11215.

It is an arithmetic number, because the mean of its divisors is an integer number (1891206).

Almost surely, 2^7542739 is an apocalyptic number.

7542739 is a deficient number, since it is larger than the sum of its proper divisors (22085).

7542739 is a wasteful number, since it uses less digits than its factorization.

7542739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22084.

The product of its digits is 52920, while the sum is 37.

The square root of 7542739 is about 2746.4047407474. The cubic root of 7542739 is about 196.1144947451.

It can be divided in two parts, 75427 and 39, that added together give a triangular number (75466 = T₃₈₈).

The spelling of 7542739 in words is "seven million, five hundred forty-two thousand, seven hundred thirty-nine".