2345521 has 4 divisors (see below), whose sum is σ = 2400112. Its totient is φ = 2290932.

The previous prime is 2345509. The next prime is 2345533. The reversal of 2345521 is 1255432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2345509) and next prime (2345533).

It is a cyclic number.

It is not a de Polignac number, because 2345521 - 2⁹ = 2345009 is a prime.

It is a super-2 number, since 2×2345521² = 11002937522882, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

2345521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2345492 and 2345501.

It is not an unprimeable number, because it can be changed into a prime (2345501) 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, 27231 + ... + 27316.

It is an arithmetic number, because the mean of its divisors is an integer number (600028).

2^2345521 is an apocalyptic number.

It is an amenable number.

2345521 is a deficient number, since it is larger than the sum of its proper divisors (54591).

2345521 is an equidigital number, since it uses as much as digits as its factorization.

2345521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54590.

The product of its digits is 1200, while the sum is 22.

The square root of 2345521 is about 1531.5093861939. The cubic root of 2345521 is about 132.8657699390.

The spelling of 2345521 in words is "two million, three hundred forty-five thousand, five hundred twenty-one".