2123247 has 8 divisors (see below), whose sum is σ = 3235456. Its totient is φ = 1213272.

The previous prime is 2123243. The next prime is 2123257. The reversal of 2123247 is 7423212.

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

It is not a de Polignac number, because 2123247 - 2² = 2123243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 101107 = 2123247 / (2 + 1 + 2 + 3 + 2 + 4 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123243) 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, 50533 + ... + 50574.

It is an arithmetic number, because the mean of its divisors is an integer number (404432).

2^2123247 is an apocalyptic number.

2123247 is a deficient number, since it is larger than the sum of its proper divisors (1112209).

2123247 is a wasteful number, since it uses less digits than its factorization.

2123247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101117.

The product of its digits is 672, while the sum is 21.

The square root of 2123247 is about 1457.1365756167. The cubic root of 2123247 is about 128.5287172062.

Adding to 2123247 its reverse (7423212), we get a palindrome (9546459).

The spelling of 2123247 in words is "two million, one hundred twenty-three thousand, two hundred forty-seven".