5451905 has 4 divisors (see below), whose sum is σ = 6542292. Its totient is φ = 4361520.

The previous prime is 5451889. The next prime is 5451931. The reversal of 5451905 is 5091545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5091545 = 5 ⋅1018309.

It can be written as a sum of positive squares in 2 ways, for example, as 923521 + 4528384 = 961^2 + 2128^2 .

It is not a de Polignac number, because 5451905 - 2⁴ = 5451889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545186 + ... + 545195.

It is an arithmetic number, because the mean of its divisors is an integer number (1635573).

Almost surely, 2^5451905 is an apocalyptic number.

It is an amenable number.

5451905 is a deficient number, since it is larger than the sum of its proper divisors (1090387).

5451905 is a wasteful number, since it uses less digits than its factorization.

5451905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090386.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 5451905 is about 2334.9314765106. The cubic root of 5451905 is about 176.0013881605.

The spelling of 5451905 in words is "five million, four hundred fifty-one thousand, nine hundred five".