45152421 has 4 divisors (see below), whose sum is σ = 60203232. Its totient is φ = 30101612.

The previous prime is 45152407. The next prime is 45152423. The reversal of 45152421 is 12425154.

45152421 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 45152421 - 2⁵ = 45152389 is a prime.

It is a super-2 number, since 2×45152421² = 4077482244322482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45152391 and 45152400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45152423) 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, 7525401 + ... + 7525406.

It is an arithmetic number, because the mean of its divisors is an integer number (15050808).

Almost surely, 2^45152421 is an apocalyptic number.

It is an amenable number.

45152421 is a deficient number, since it is larger than the sum of its proper divisors (15050811).

45152421 is a wasteful number, since it uses less digits than its factorization.

45152421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15050810.

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

The square root of 45152421 is about 6719.5551192025. Note that the first 3 decimals coincide. The cubic root of 45152421 is about 356.0904669509.

Adding to 45152421 its reverse (12425154), we get a palindrome (57577575).

The spelling of 45152421 in words is "forty-five million, one hundred fifty-two thousand, four hundred twenty-one".