45421521 has 4 divisors (see below), whose sum is σ = 60562032. Its totient is φ = 30281012.

The previous prime is 45421517. The next prime is 45421531. The reversal of 45421521 is 12512454.

45421521 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 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 45421521 - 2² = 45421517 is a prime.

It is a super-2 number, since 2×45421521² = 4126229139906882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 45421491 and 45421500.

It is not an unprimeable number, because it can be changed into a prime (45421531) 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, 7570251 + ... + 7570256.

It is an arithmetic number, because the mean of its divisors is an integer number (15140508).

Almost surely, 2^45421521 is an apocalyptic number.

It is an amenable number.

45421521 is a deficient number, since it is larger than the sum of its proper divisors (15140511).

45421521 is a wasteful number, since it uses less digits than its factorization.

45421521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15140510.

The product of its digits is 1600, while the sum is 24.

The square root of 45421521 is about 6739.5490205206. The cubic root of 45421521 is about 356.7964771424.

Adding to 45421521 its reverse (12512454), we get a palindrome (57933975).

The spelling of 45421521 in words is "forty-five million, four hundred twenty-one thousand, five hundred twenty-one".