2539742 has 4 divisors (see below), whose sum is σ = 3809616. Its totient is φ = 1269870.

The previous prime is 2539699. The next prime is 2539753. The reversal of 2539742 is 2479352.

It is a happy number.

2539742 is digitally balanced in base 2, 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.

It is a junction number, because it is equal to n+sod(n) for n = 2539699 and 2539708.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634934 + ... + 634937.

It is an arithmetic number, because the mean of its divisors is an integer number (952404).

2^2539742 is an apocalyptic number.

2539742 is a deficient number, since it is larger than the sum of its proper divisors (1269874).

2539742 is a wasteful number, since it uses less digits than its factorization.

2539742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269873.

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

The square root of 2539742 is about 1593.6568011965. The cubic root of 2539742 is about 136.4362791674.

The spelling of 2539742 in words is "two million, five hundred thirty-nine thousand, seven hundred forty-two".