1940651 has 4 divisors (see below), whose sum is σ = 2007600. Its totient is φ = 1873704.

The previous prime is 1940639. The next prime is 1940663. The reversal of 1940651 is 1560491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1560491 = 59 ⋅26449.

It is an interprime number because it is at equal distance from previous prime (1940639) and next prime (1940663).

It is a cyclic number.

It is not a de Polignac number, because 1940651 - 2¹⁸ = 1678507 is a prime.

It is a super-2 number, since 2×1940651² = 7532252607602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1940651.

It is not an unprimeable number, because it can be changed into a prime (1940621) 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 3 ways as a sum of consecutive naturals, for example, 33431 + ... + 33488.

It is an arithmetic number, because the mean of its divisors is an integer number (501900).

2^1940651 is an apocalyptic number.

1940651 is a deficient number, since it is larger than the sum of its proper divisors (66949).

1940651 is an equidigital number, since it uses as much as digits as its factorization.

1940651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66948.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1940651 is about 1393.0725034972. The cubic root of 1940651 is about 124.7333194565.

The spelling of 1940651 in words is "one million, nine hundred forty thousand, six hundred fifty-one".