451495421 has 4 divisors (see below), whose sum is σ = 486225852. Its totient is φ = 416764992.

The previous prime is 451495409. The next prime is 451495427. The reversal of 451495421 is 124594154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124594154 = 2 ⋅62297077.

It can be written as a sum of positive squares in 2 ways, for example, as 132480100 + 319015321 = 11510^2 + 17861^2 .

It is a cyclic number.

It is not a de Polignac number, because 451495421 - 2²² = 447301117 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 (451495427) 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, 17365196 + ... + 17365221.

It is an arithmetic number, because the mean of its divisors is an integer number (121556463).

Almost surely, 2^451495421 is an apocalyptic number.

It is an amenable number.

451495421 is a deficient number, since it is larger than the sum of its proper divisors (34730431).

451495421 is a wasteful number, since it uses less digits than its factorization.

451495421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34730430.

The product of its digits is 28800, while the sum is 35.

The square root of 451495421 is about 21248.4216119692. The cubic root of 451495421 is about 767.1573495487.

The spelling of 451495421 in words is "four hundred fifty-one million, four hundred ninety-five thousand, four hundred twenty-one".