2239749 has 6 divisors (see below), whose sum is σ = 3235206. Its totient is φ = 1493160.

The previous prime is 2239747. The next prime is 2239751. The reversal of 2239749 is 9479322.

It is an interprime number because it is at equal distance from previous prime (2239747) and next prime (2239751).

It can be written as a sum of positive squares in only one way, i.e., 1979649 + 260100 = 1407^2 + 510^2 .

It is not a de Polignac number, because 2239749 - 2¹ = 2239747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2239747) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124422 + ... + 124439.

It is an arithmetic number, because the mean of its divisors is an integer number (539201).

2^2239749 is an apocalyptic number.

It is an amenable number.

2239749 is a deficient number, since it is larger than the sum of its proper divisors (995457).

2239749 is a wasteful number, since it uses less digits than its factorization.

2239749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248867 (or 248864 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 2239749 is about 1496.5790991458. The cubic root of 2239749 is about 130.8377650962.

It can be divided in two parts, 22 and 39749, that multiplied together give a palindrome (874478).

The spelling of 2239749 in words is "two million, two hundred thirty-nine thousand, seven hundred forty-nine".