45215421 has 8 divisors (see below), whose sum is σ = 63460320. Its totient is φ = 28557072.

The previous prime is 45215411. The next prime is 45215441. The reversal of 45215421 is 12451254.

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

It is not a de Polignac number, because 45215421 - 2⁹ = 45214909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45215391 and 45215400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45215411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396570 + ... + 396683.

It is an arithmetic number, because the mean of its divisors is an integer number (7932540).

Almost surely, 2^45215421 is an apocalyptic number.

It is an amenable number.

45215421 is a deficient number, since it is larger than the sum of its proper divisors (18244899).

45215421 is a wasteful number, since it uses less digits than its factorization.

45215421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793275.

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

The square root of 45215421 is about 6724.2412954920. The cubic root of 45215421 is about 356.2560045772.

Adding to 45215421 its reverse (12451254), we get a palindrome (57666675).

The spelling of 45215421 in words is "forty-five million, two hundred fifteen thousand, four hundred twenty-one".