2640242 has 8 divisors (see below), whose sum is σ = 4320432. Its totient is φ = 1200100.

The previous prime is 2640227. The next prime is 2640251. The reversal of 2640242 is 2420462.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59984 + ... + 60027.

It is an arithmetic number, because the mean of its divisors is an integer number (540054).

2^2640242 is an apocalyptic number.

2640242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2640242 is a deficient number, since it is larger than the sum of its proper divisors (1680190).

2640242 is a wasteful number, since it uses less digits than its factorization.

2640242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120024.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2640242 is about 1624.8821495727. The cubic root of 2640242 is about 138.2126875076.

It can be divided in two parts, 2640 and 242, that added together give a palindrome (2882).

The spelling of 2640242 in words is "two million, six hundred forty thousand, two hundred forty-two".