2140581 has 8 divisors (see below), whose sum is σ = 2946304. Its totient is φ = 1380960.

The previous prime is 2140573. The next prime is 2140591. The reversal of 2140581 is 1850412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2140581 - 2³ = 2140573 is a prime.

It is a super-2 number, since 2×2140581² = 9164174035122, which contains 22 as substring.

It is a Duffinian number.

2140581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11416 + ... + 11601.

It is an arithmetic number, because the mean of its divisors is an integer number (368288).

2^2140581 is an apocalyptic number.

It is an amenable number.

2140581 is a deficient number, since it is larger than the sum of its proper divisors (805723).

2140581 is a wasteful number, since it uses less digits than its factorization.

2140581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23051.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 2140581 is about 1463.0724520679. The cubic root of 2140581 is about 128.8775353599.

Adding to 2140581 its reverse (1850412), we get a palindrome (3990993).

The spelling of 2140581 in words is "two million, one hundred forty thousand, five hundred eighty-one".