2563742 has 4 divisors (see below), whose sum is σ = 3845616. Its totient is φ = 1281870.

The previous prime is 2563733. The next prime is 2563747. The reversal of 2563742 is 2473652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563747) 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 as a sum of consecutive naturals, namely, 640934 + ... + 640937.

It is an arithmetic number, because the mean of its divisors is an integer number (961404).

2^2563742 is an apocalyptic number.

2563742 is a deficient number, since it is larger than the sum of its proper divisors (1281874).

2563742 is a wasteful number, since it uses less digits than its factorization.

2563742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281873.

The product of its digits is 10080, while the sum is 29.

The square root of 2563742 is about 1601.1689479877. The cubic root of 2563742 is about 136.8646967217.

The spelling of 2563742 in words is "two million, five hundred sixty-three thousand, seven hundred forty-two".