45451421 has 8 divisors (see below), whose sum is σ = 48185280. Its totient is φ = 42724288.

The previous prime is 45451403. The next prime is 45451423. The reversal of 45451421 is 12415454.

45451421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45451421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45451423) 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 7 ways as a sum of consecutive naturals, for example, 21410 + ... + 23436.

It is an arithmetic number, because the mean of its divisors is an integer number (6023160).

Almost surely, 2^45451421 is an apocalyptic number.

It is an amenable number.

45451421 is a deficient number, since it is larger than the sum of its proper divisors (2733859).

45451421 is a wasteful number, since it uses less digits than its factorization.

45451421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363.

The product of its digits is 3200, while the sum is 26.

The square root of 45451421 is about 6741.7669048996. The cubic root of 45451421 is about 356.8747504249.

Adding to 45451421 its reverse (12415454), we get a palindrome (57866875).

The spelling of 45451421 in words is "forty-five million, four hundred fifty-one thousand, four hundred twenty-one".