1940815 has 4 divisors (see below), whose sum is σ = 2328984. Its totient is φ = 1552648.

The previous prime is 1940797. The next prime is 1940821. The reversal of 1940815 is 5180491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5180491 = 1289 ⋅4019.

It is a cyclic number.

It is not a de Polignac number, because 1940815 - 2¹⁵ = 1908047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194077 + ... + 194086.

It is an arithmetic number, because the mean of its divisors is an integer number (582246).

2^1940815 is an apocalyptic number.

1940815 is a deficient number, since it is larger than the sum of its proper divisors (388169).

1940815 is an equidigital number, since it uses as much as digits as its factorization.

1940815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388168.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1940815 is about 1393.1313649473. The cubic root of 1940815 is about 124.7368330005.

The spelling of 1940815 in words is "one million, nine hundred forty thousand, eight hundred fifteen".