45240421 has 2 divisors, whose sum is σ = 45240422. Its totient is φ = 45240420.

The previous prime is 45240413. The next prime is 45240427. The reversal of 45240421 is 12404254.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37344321 + 7896100 = 6111^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 45240421 - 2³ = 45240413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45240392 and 45240401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45240427) 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, 22620210 + 22620211.

It is an arithmetic number, because the mean of its divisors is an integer number (22620211).

Almost surely, 2^45240421 is an apocalyptic number.

It is an amenable number.

45240421 is a deficient number, since it is larger than the sum of its proper divisors (1).

45240421 is an equidigital number, since it uses as much as digits as its factorization.

45240421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 45240421 is about 6726.0999843892. The cubic root of 45240421 is about 356.3216514954.

Adding to 45240421 its reverse (12404254), we get a palindrome (57644675).

It can be divided in two parts, 4 and 5240421, that added together give a palindrome (5240425).

The spelling of 45240421 in words is "forty-five million, two hundred forty thousand, four hundred twenty-one".