5451645 has 16 divisors (see below), whose sum is σ = 9236160. Its totient is φ = 2736384.

The previous prime is 5451643. The next prime is 5451673. The reversal of 5451645 is 5461545.

It is not a de Polignac number, because 5451645 - 2¹ = 5451643 is a prime.

5451645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5451643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10435 + ... + 10944.

It is an arithmetic number, because the mean of its divisors is an integer number (577260).

Almost surely, 2^5451645 is an apocalyptic number.

It is an amenable number.

5451645 is a deficient number, since it is larger than the sum of its proper divisors (3784515).

5451645 is a wasteful number, since it uses less digits than its factorization.

5451645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21404.

The product of its digits is 12000, while the sum is 30.

The square root of 5451645 is about 2334.8757996947. The cubic root of 5451645 is about 175.9985902952.

Adding to 5451645 its product of digits (12000), we get a palindrome (5463645).

The spelling of 5451645 in words is "five million, four hundred fifty-one thousand, six hundred forty-five".