2309745 has 16 divisors (see below), whose sum is σ = 3782592. Its totient is φ = 1202880.

The previous prime is 2309743. The next prime is 2309753. The reversal of 2309745 is 5479032.

It is not a de Polignac number, because 2309745 - 2¹ = 2309743 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2309743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1146 + ... + 2435.

It is an arithmetic number, because the mean of its divisors is an integer number (236412).

2^2309745 is an apocalyptic number.

It is an amenable number.

2309745 is a deficient number, since it is larger than the sum of its proper divisors (1472847).

2309745 is a wasteful number, since it uses less digits than its factorization.

2309745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 2309745 is about 1519.7845242007. The cubic root of 2309745 is about 132.1867764549.

The spelling of 2309745 in words is "two million, three hundred nine thousand, seven hundred forty-five".