2509942 has 4 divisors (see below), whose sum is σ = 3764916. Its totient is φ = 1254970.

The previous prime is 2509937. The next prime is 2509961. The reversal of 2509942 is 2499052.

2509942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627484 + ... + 627487.

It is an arithmetic number, because the mean of its divisors is an integer number (941229).

2^2509942 is an apocalyptic number.

2509942 is a deficient number, since it is larger than the sum of its proper divisors (1254974).

2509942 is a wasteful number, since it uses less digits than its factorization.

2509942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254973.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2509942 is about 1584.2796470321. The cubic root of 2509942 is about 135.9005544641.

The spelling of 2509942 in words is "two million, five hundred nine thousand, nine hundred forty-two".