2539942 has 4 divisors (see below), whose sum is σ = 3809916. Its totient is φ = 1269970.

The previous prime is 2539871. The next prime is 2539951. The reversal of 2539942 is 2499352.

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 = 2539898 and 2539907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634984 + ... + 634987.

It is an arithmetic number, because the mean of its divisors is an integer number (952479).

2^2539942 is an apocalyptic number.

2539942 is a deficient number, since it is larger than the sum of its proper divisors (1269974).

2539942 is a wasteful number, since it uses less digits than its factorization.

2539942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269973.

The product of its digits is 19440, while the sum is 34.

The square root of 2539942 is about 1593.7195487287. The cubic root of 2539942 is about 136.4398604418.

It can be divided in two parts, 2539 and 942, that added together give a square (3481 = 59²).

The spelling of 2539942 in words is "two million, five hundred thirty-nine thousand, nine hundred forty-two".