1945138 has 16 divisors (see below), whose sum is σ = 3185280. Its totient is φ = 885456.

The previous prime is 1945129. The next prime is 1945169. The reversal of 1945138 is 8315491.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581 + ... + 2527.

It is an arithmetic number, because the mean of its divisors is an integer number (199080).

2^1945138 is an apocalyptic number.

1945138 is a deficient number, since it is larger than the sum of its proper divisors (1240142).

1945138 is a wasteful number, since it uses less digits than its factorization.

1945138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041.

The product of its digits is 4320, while the sum is 31.

The square root of 1945138 is about 1394.6820426176. The cubic root of 1945138 is about 124.8293778774.

The spelling of 1945138 in words is "one million, nine hundred forty-five thousand, one hundred thirty-eight".