2140442 has 4 divisors (see below), whose sum is σ = 3210666. Its totient is φ = 1070220.

The previous prime is 2140441. The next prime is 2140447. The reversal of 2140442 is 2440412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1485961 + 654481 = 1219^2 + 809^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2140442.

It is not an unprimeable number, because it can be changed into a prime (2140441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535109 + ... + 535112.

2^2140442 is an apocalyptic number.

2140442 is a deficient number, since it is larger than the sum of its proper divisors (1070224).

2140442 is a wasteful number, since it uses less digits than its factorization.

2140442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070223.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2140442 is about 1463.0249485228. The cubic root of 2140442 is about 128.8747457177.

Adding to 2140442 its reverse (2440412), we get a palindrome (4580854).

The spelling of 2140442 in words is "two million, one hundred forty thousand, four hundred forty-two".