1940139 has 16 divisors (see below), whose sum is σ = 2897440. Its totient is φ = 1283040.

The previous prime is 1940137. The next prime is 1940143. The reversal of 1940139 is 9310491.

It is not a de Polignac number, because 1940139 - 2¹ = 1940137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

1940139 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4689 + ... + 5085.

It is an arithmetic number, because the mean of its divisors is an integer number (181090).

2^1940139 is an apocalyptic number.

1940139 is a deficient number, since it is larger than the sum of its proper divisors (957301).

1940139 is a wasteful number, since it uses less digits than its factorization.

1940139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1940139 is about 1392.8887249167. Note that the first 3 decimals coincide. The cubic root of 1940139 is about 124.7223490696.

The spelling of 1940139 in words is "one million, nine hundred forty thousand, one hundred thirty-nine".