45132421 has 2 divisors, whose sum is σ = 45132422. Its totient is φ = 45132420.

The previous prime is 45132407. The next prime is 45132443. The reversal of 45132421 is 12423154.

It is an a-pointer prime, because the next prime (45132443) can be obtained adding 45132421 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24611521 + 20520900 = 4961^2 + 4530^2 .

It is a cyclic number.

It is not a de Polignac number, because 45132421 - 2⁵ = 45132389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45132392 and 45132401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45132401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22566210 + 22566211.

It is an arithmetic number, because the mean of its divisors is an integer number (22566211).

Almost surely, 2^45132421 is an apocalyptic number.

It is an amenable number.

45132421 is a deficient number, since it is larger than the sum of its proper divisors (1).

45132421 is an equidigital number, since it uses as much as digits as its factorization.

45132421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 22.

The square root of 45132421 is about 6718.0667606090. The cubic root of 45132421 is about 356.0378831251.

Adding to 45132421 its reverse (12423154), we get a palindrome (57555575).

The spelling of 45132421 in words is "forty-five million, one hundred thirty-two thousand, four hundred twenty-one".