2551242 has 8 divisors (see below), whose sum is σ = 5102496. Its totient is φ = 850412.

The previous prime is 2551223. The next prime is 2551247. The reversal of 2551242 is 2421552.

It is a happy number.

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

2551242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2551247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212598 + ... + 212609.

It is an arithmetic number, because the mean of its divisors is an integer number (637812).

2^2551242 is an apocalyptic number.

2551242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2551242 is a wasteful number, since it uses less digits than its factorization.

2551242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425212.

The product of its digits is 800, while the sum is 21.

The square root of 2551242 is about 1597.2607802109. The cubic root of 2551242 is about 136.6418978181.

Adding to 2551242 its reverse (2421552), we get a palindrome (4972794).

The spelling of 2551242 in words is "two million, five hundred fifty-one thousand, two hundred forty-two".