451027621 has 6 divisors (see below), whose sum is σ = 495757766. Its totient is φ = 410025000.

The previous prime is 451027607. The next prime is 451027667. The reversal of 451027621 is 126720154.

It can be written as a sum of positive squares in only one way, i.e., 450712900 + 314721 = 21230^2 + 561^2 .

It is not a de Polignac number, because 451027621 - 2²⁷ = 316809893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 451027621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451027601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1863630 + ... + 1863871.

Almost surely, 2^451027621 is an apocalyptic number.

It is an amenable number.

451027621 is a deficient number, since it is larger than the sum of its proper divisors (44730145).

451027621 is a wasteful number, since it uses less digits than its factorization.

451027621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3727523 (or 3727512 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 451027621 is about 21237.4108826853. The cubic root of 451027621 is about 766.8923042435.

Adding to 451027621 its reverse (126720154), we get a palindrome (577747775).

It can be divided in two parts, 4510 and 27621, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 451027621 in words is "four hundred fifty-one million, twenty-seven thousand, six hundred twenty-one".