2139545 has 8 divisors (see below), whose sum is σ = 2578560. Its totient is φ = 1704240.

The previous prime is 2139541. The next prime is 2139563. The reversal of 2139545 is 5459312.

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

It is not a de Polignac number, because 2139545 - 2² = 2139541 is a prime.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 566 + ... + 2144.

It is an arithmetic number, because the mean of its divisors is an integer number (322320).

2^2139545 is an apocalyptic number.

It is an amenable number.

2139545 is a deficient number, since it is larger than the sum of its proper divisors (439015).

2139545 is a wasteful number, since it uses less digits than its factorization.

2139545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855.

The product of its digits is 5400, while the sum is 29.

The square root of 2139545 is about 1462.7183597672. The cubic root of 2139545 is about 128.8567405893.

The spelling of 2139545 in words is "two million, one hundred thirty-nine thousand, five hundred forty-five".