2445521 has 8 divisors (see below), whose sum is σ = 2748480. Its totient is φ = 2158992.

The previous prime is 2445517. The next prime is 2445523. The reversal of 2445521 is 1255442.

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 2445521 - 2² = 2445517 is a prime.

It is a super-2 number, since 2×2445521² = 11961145922882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2445523) 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, 3791 + ... + 4388.

It is an arithmetic number, because the mean of its divisors is an integer number (343560).

2^2445521 is an apocalyptic number.

It is an amenable number.

2445521 is a deficient number, since it is larger than the sum of its proper divisors (302959).

2445521 is a wasteful number, since it uses less digits than its factorization.

2445521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8215.

The product of its digits is 1600, while the sum is 23.

The square root of 2445521 is about 1563.8161656665. The cubic root of 2445521 is about 134.7277733277.

The spelling of 2445521 in words is "two million, four hundred forty-five thousand, five hundred twenty-one".