2521247 has 8 divisors (see below), whose sum is σ = 2590080. Its totient is φ = 2453400.

The previous prime is 2521223. The next prime is 2521249. The reversal of 2521247 is 7421252.

It is a happy number.

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 2521247 - 2¹⁶ = 2455711 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8768 + ... + 9050.

It is an arithmetic number, because the mean of its divisors is an integer number (323760).

2^2521247 is an apocalyptic number.

2521247 is a deficient number, since it is larger than the sum of its proper divisors (68833).

2521247 is a wasteful number, since it uses less digits than its factorization.

2521247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493.

The product of its digits is 1120, while the sum is 23.

The square root of 2521247 is about 1587.8435061428. The cubic root of 2521247 is about 136.1042849215.

Adding to 2521247 its reverse (7421252), we get a palindrome (9942499).

The spelling of 2521247 in words is "two million, five hundred twenty-one thousand, two hundred forty-seven".