2140469 has 4 divisors (see below), whose sum is σ = 2143596. Its totient is φ = 2137344.

The previous prime is 2140459. The next prime is 2140477. The reversal of 2140469 is 9640412.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3025 + 2137444 = 55^2 + 1462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2140469 is a prime.

It is a super-2 number, since 2×2140469² = 9163215079922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140459) 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, 44 + ... + 2069.

It is an arithmetic number, because the mean of its divisors is an integer number (535899).

2^2140469 is an apocalyptic number.

It is an amenable number.

2140469 is a deficient number, since it is larger than the sum of its proper divisors (3127).

2140469 is a wasteful number, since it uses less digits than its factorization.

2140469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2140469 is about 1463.0341759508. The cubic root of 2140469 is about 128.8752876001.

The spelling of 2140469 in words is "two million, one hundred forty thousand, four hundred sixty-nine".