45451321 has 8 divisors (see below), whose sum is σ = 46103040. Its totient is φ = 44802912.

The previous prime is 45451309. The next prime is 45451327. The reversal of 45451321 is 12315454.

It is a happy number.

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-45451321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45451327) 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, 40656 + ... + 41758.

It is an arithmetic number, because the mean of its divisors is an integer number (5762880).

Almost surely, 2^45451321 is an apocalyptic number.

It is an amenable number.

45451321 is a deficient number, since it is larger than the sum of its proper divisors (651719).

45451321 is a wasteful number, since it uses less digits than its factorization.

45451321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655.

The product of its digits is 2400, while the sum is 25.

The square root of 45451321 is about 6741.7594884422. The cubic root of 45451321 is about 356.8744886985.

Adding to 45451321 its reverse (12315454), we get a palindrome (57766775).

The spelling of 45451321 in words is "forty-five million, four hundred fifty-one thousand, three hundred twenty-one".