45581421 has 8 divisors (see below), whose sum is σ = 60808320. Its totient is φ = 30371072.

The previous prime is 45581383. The next prime is 45581429. The reversal of 45581421 is 12418554.

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

It is a cyclic number.

It is not a de Polignac number, because 45581421 - 2¹⁸ = 45319277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45581429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5500 + ... + 11018.

It is an arithmetic number, because the mean of its divisors is an integer number (7601040).

Almost surely, 2^45581421 is an apocalyptic number.

It is an amenable number.

45581421 is a deficient number, since it is larger than the sum of its proper divisors (15226899).

45581421 is a wasteful number, since it uses less digits than its factorization.

45581421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275.

The product of its digits is 6400, while the sum is 30.

The square root of 45581421 is about 6751.4014100778. The cubic root of 45581421 is about 357.2146705342.

Adding to 45581421 its reverse (12418554), we get a palindrome (57999975).

The spelling of 45581421 in words is "forty-five million, five hundred eighty-one thousand, four hundred twenty-one".