2909642 has 4 divisors (see below), whose sum is σ = 4364466. Its totient is φ = 1454820.

The previous prime is 2909633. The next prime is 2909659. The reversal of 2909642 is 2469092.

2909642 is nontrivially palindromic in base 9.

2909642 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 can be written as a sum of positive squares in only one way, i.e., 2819041 + 90601 = 1679^2 + 301^2 .

It is a d-powerful number, because it can be written as 2³ + 9² + 0 + 9⁶ + 6⁷ + 4⁵ + 2²¹ .

It is a junction number, because it is equal to n+sod(n) for n = 2909599 and 2909608.

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, 727409 + ... + 727412.

2^2909642 is an apocalyptic number.

2909642 is a deficient number, since it is larger than the sum of its proper divisors (1454824).

2909642 is a wasteful number, since it uses less digits than its factorization.

2909642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454823.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 2909642 is about 1705.7672760374. The cubic root of 2909642 is about 142.7621847995.

The spelling of 2909642 in words is "two million, nine hundred nine thousand, six hundred forty-two".