2245709 has 4 divisors (see below), whose sum is σ = 2267616. Its totient is φ = 2223804.

The previous prime is 2245687. The next prime is 2245721. The reversal of 2245709 is 9075422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9075422 = 2 ⋅4537711.

It is a cyclic number.

It is not a de Polignac number, because 2245709 - 2¹⁶ = 2180173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2245739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10799 + ... + 11004.

It is an arithmetic number, because the mean of its divisors is an integer number (566904).

2^2245709 is an apocalyptic number.

It is an amenable number.

2245709 is a deficient number, since it is larger than the sum of its proper divisors (21907).

2245709 is a wasteful number, since it uses less digits than its factorization.

2245709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21906.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 2245709 is about 1498.5689840645. The cubic root of 2245709 is about 130.9537159491.

The spelling of 2245709 in words is "two million, two hundred forty-five thousand, seven hundred nine".