2145139 has 8 divisors (see below), whose sum is σ = 2205648. Its totient is φ = 2085600.

The previous prime is 2145137. The next prime is 2145151. The reversal of 2145139 is 9315412.

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

It is a cyclic number.

It is not a de Polignac number, because 2145139 - 2¹ = 2145137 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145131) 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, 6609 + ... + 6925.

It is an arithmetic number, because the mean of its divisors is an integer number (275706).

2^2145139 is an apocalyptic number.

2145139 is a deficient number, since it is larger than the sum of its proper divisors (60509).

2145139 is a wasteful number, since it uses less digits than its factorization.

2145139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485.

The product of its digits is 1080, while the sum is 25.

The square root of 2145139 is about 1464.6293046365. The cubic root of 2145139 is about 128.9689447108.

The spelling of 2145139 in words is "two million, one hundred forty-five thousand, one hundred thirty-nine".