45812521 has 4 divisors (see below), whose sum is σ = 45883332. Its totient is φ = 45741712.

The previous prime is 45812519. The next prime is 45812551. The reversal of 45812521 is 12521854.

45812521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12521854 = 2 ⋅6260927.

It can be written as a sum of positive squares in 2 ways, for example, as 8785296 + 37027225 = 2964^2 + 6085^2 .

It is a cyclic number.

It is not a de Polignac number, because 45812521 - 2¹ = 45812519 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 45812521.

It is not an unprimeable number, because it can be changed into a prime (45812551) 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, 34426 + ... + 35731.

It is an arithmetic number, because the mean of its divisors is an integer number (11470833).

Almost surely, 2^45812521 is an apocalyptic number.

It is an amenable number.

45812521 is a deficient number, since it is larger than the sum of its proper divisors (70811).

45812521 is an equidigital number, since it uses as much as digits as its factorization.

45812521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70810.

The product of its digits is 3200, while the sum is 28.

The square root of 45812521 is about 6768.4947366457. The cubic root of 45812521 is about 357.8173516666.

The spelling of 45812521 in words is "forty-five million, eight hundred twelve thousand, five hundred twenty-one".