451187461 has 2 divisors, whose sum is σ = 451187462. Its totient is φ = 451187460.

The previous prime is 451187459. The next prime is 451187489. The reversal of 451187461 is 164781154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377330625 + 73856836 = 19425^2 + 8594^2 .

It is a cyclic number.

It is not a de Polignac number, because 451187461 - 2¹ = 451187459 is a prime.

Together with 451187459, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 451187461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451187441) 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 as a sum of consecutive naturals, namely, 225593730 + 225593731.

It is an arithmetic number, because the mean of its divisors is an integer number (225593731).

Almost surely, 2^451187461 is an apocalyptic number.

It is an amenable number.

451187461 is a deficient number, since it is larger than the sum of its proper divisors (1).

451187461 is an equidigital number, since it uses as much as digits as its factorization.

451187461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 451187461 is about 21241.1737199242. The cubic root of 451187461 is about 766.9828867139.

The spelling of 451187461 in words is "four hundred fifty-one million, one hundred eighty-seven thousand, four hundred sixty-one".