2540242 has 8 divisors (see below), whose sum is σ = 4034556. Its totient is φ = 1195392.

The previous prime is 2540231. The next prime is 2540249. The reversal of 2540242 is 2420452.

It can be written as a sum of positive squares in 2 ways, for example, as 2076481 + 463761 = 1441^2 + 681^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2540249) 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, 37323 + ... + 37390.

2^2540242 is an apocalyptic number.

2540242 is a deficient number, since it is larger than the sum of its proper divisors (1494314).

2540242 is a wasteful number, since it uses less digits than its factorization.

2540242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74732.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 2540242 is about 1593.8136653950. The cubic root of 2540242 is about 136.4452320011.

Adding to 2540242 its reverse (2420452), we get a palindrome (4960694).

The spelling of 2540242 in words is "two million, five hundred forty thousand, two hundred forty-two".