2147749 has 8 divisors (see below), whose sum is σ = 2207448. Its totient is φ = 2088960.

The previous prime is 2147737. The next prime is 2147753. The reversal of 2147749 is 9477412.

It can be written as a sum of positive squares in 4 ways, for example, as 431649 + 1716100 = 657^2 + 1310^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2147749 - 2⁹ = 2147237 is a prime.

It is a super-2 number, since 2×2147749² = 9225651534002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2141749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8229 + ... + 8485.

It is an arithmetic number, because the mean of its divisors is an integer number (275931).

2^2147749 is an apocalyptic number.

It is an amenable number.

2147749 is a deficient number, since it is larger than the sum of its proper divisors (59699).

2147749 is a wasteful number, since it uses less digits than its factorization.

2147749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

The product of its digits is 14112, while the sum is 34.

The square root of 2147749 is about 1465.5200442164. The cubic root of 2147749 is about 129.0212292045.

The spelling of 2147749 in words is "two million, one hundred forty-seven thousand, seven hundred forty-nine".