2945521 has 4 divisors (see below), whose sum is σ = 2989552. Its totient is φ = 2901492.

The previous prime is 2945519. The next prime is 2945531. The reversal of 2945521 is 1255492.

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 a cyclic number.

It is not a de Polignac number, because 2945521 - 2¹ = 2945519 is a prime.

It is a super-2 number, since 2×2945521² = 17352187922882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2945521.

It is not an unprimeable number, because it can be changed into a prime (2945531) 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 3 ways as a sum of consecutive naturals, for example, 21915 + ... + 22048.

It is an arithmetic number, because the mean of its divisors is an integer number (747388).

2^2945521 is an apocalyptic number.

It is an amenable number.

2945521 is a deficient number, since it is larger than the sum of its proper divisors (44031).

2945521 is an equidigital number, since it uses as much as digits as its factorization.

2945521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44030.

The product of its digits is 3600, while the sum is 28.

The square root of 2945521 is about 1716.2520211204. The cubic root of 2945521 is about 143.3465927281.

The spelling of 2945521 in words is "two million, nine hundred forty-five thousand, five hundred twenty-one".