3138945 has 8 divisors (see below), whose sum is σ = 5022336. Its totient is φ = 1674096.

The previous prime is 3138943. The next prime is 3138953. The reversal of 3138945 is 5498313.

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

It is not a de Polignac number, because 3138945 - 2¹ = 3138943 is a prime.

3138945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3138943) 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, 104617 + ... + 104646.

It is an arithmetic number, because the mean of its divisors is an integer number (627792).

Almost surely, 2^3138945 is an apocalyptic number.

It is an amenable number.

3138945 is a deficient number, since it is larger than the sum of its proper divisors (1883391).

3138945 is a wasteful number, since it uses less digits than its factorization.

3138945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209271.

The product of its digits is 12960, while the sum is 33.

The square root of 3138945 is about 1771.7068041863. The cubic root of 3138945 is about 146.4180331783.

The spelling of 3138945 in words is "three million, one hundred thirty-eight thousand, nine hundred forty-five".