1940007 has 4 divisors (see below), whose sum is σ = 2586680. Its totient is φ = 1293336.

The previous prime is 1939999. The next prime is 1940041. The reversal of 1940007 is 7000491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7000491 = 3 ⋅2333497.

It is not a de Polignac number, because 1940007 - 2³ = 1939999 is a prime.

It is a D-number.

It is a Duffinian number.

1940007 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323332 + ... + 323337.

It is an arithmetic number, because the mean of its divisors is an integer number (646670).

2^1940007 is an apocalyptic number.

1940007 is a deficient number, since it is larger than the sum of its proper divisors (646673).

1940007 is an equidigital number, since it uses as much as digits as its factorization.

1940007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646672.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1940007 is about 1392.8413405697. The cubic root of 1940007 is about 124.7195204538.

Adding to 1940007 its reverse (7000491), we get a palindrome (8940498).

The spelling of 1940007 in words is "one million, nine hundred forty thousand, seven".