2139542 has 8 divisors (see below), whose sum is σ = 3238056. Its totient is φ = 1060192.

The previous prime is 2139541. The next prime is 2139563. The reversal of 2139542 is 2459312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139541) 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, 4508 + ... + 4959.

It is an arithmetic number, because the mean of its divisors is an integer number (404757).

2^2139542 is an apocalyptic number.

2139542 is a deficient number, since it is larger than the sum of its proper divisors (1098514).

2139542 is a wasteful number, since it uses less digits than its factorization.

2139542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9582.

The product of its digits is 2160, while the sum is 26.

The square root of 2139542 is about 1462.7173342789. The cubic root of 2139542 is about 128.8566803630.

The spelling of 2139542 in words is "two million, one hundred thirty-nine thousand, five hundred forty-two".