451425805 has 4 divisors (see below), whose sum is σ = 541710972. Its totient is φ = 361140640.

The previous prime is 451425797. The next prime is 451425809. The reversal of 451425805 is 508524154.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508524154 = 2 ⋅254262077.

It can be written as a sum of positive squares in 2 ways, for example, as 121749156 + 329676649 = 11034^2 + 18157^2 .

It is not a de Polignac number, because 451425805 - 2³ = 451425797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451425809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45142576 + ... + 45142585.

It is an arithmetic number, because the mean of its divisors is an integer number (135427743).

Almost surely, 2^451425805 is an apocalyptic number.

It is an amenable number.

451425805 is a deficient number, since it is larger than the sum of its proper divisors (90285167).

451425805 is an equidigital number, since it uses as much as digits as its factorization.

451425805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90285166.

The product of its (nonzero) digits is 32000, while the sum is 34.

The square root of 451425805 is about 21246.7834036119. The cubic root of 451425805 is about 767.1179182361.

Adding to 451425805 its reverse (508524154), we get a palindrome (959949959).

The spelling of 451425805 in words is "four hundred fifty-one million, four hundred twenty-five thousand, eight hundred five".