2149447 has 4 divisors (see below), whose sum is σ = 2218816. Its totient is φ = 2080080.

The previous prime is 2149421. The next prime is 2149453. The reversal of 2149447 is 7449412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2149447 - 2¹⁵ = 2116679 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 69337 = 2149447 / (2 + 1 + 4 + 9 + 4 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149247) 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, 34638 + ... + 34699.

It is an arithmetic number, because the mean of its divisors is an integer number (554704).

2^2149447 is an apocalyptic number.

2149447 is a deficient number, since it is larger than the sum of its proper divisors (69369).

2149447 is an equidigital number, since it uses as much as digits as its factorization.

2149447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69368.

The product of its digits is 8064, while the sum is 31.

The square root of 2149447 is about 1466.0992462995. The cubic root of 2149447 is about 129.0552214352.

The spelling of 2149447 in words is "two million, one hundred forty-nine thousand, four hundred forty-seven".