2645042 has 4 divisors (see below), whose sum is σ = 3967566. Its totient is φ = 1322520.

The previous prime is 2645011. The next prime is 2645051. The reversal of 2645042 is 2405462.

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., 1907161 + 737881 = 1381^2 + 859^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2644999 and 2645017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661259 + ... + 661262.

2^2645042 is an apocalyptic number.

2645042 is a deficient number, since it is larger than the sum of its proper divisors (1322524).

2645042 is a wasteful number, since it uses less digits than its factorization.

2645042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322523.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2645042 is about 1626.3585090625. The cubic root of 2645042 is about 138.2963943887.

The spelling of 2645042 in words is "two million, six hundred forty-five thousand, forty-two".