451140247 has 2 divisors, whose sum is σ = 451140248. Its totient is φ = 451140246.

The previous prime is 451140229. The next prime is 451140251. The reversal of 451140247 is 742041154.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 451140247 - 2⁷ = 451140119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451140227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225570123 + 225570124.

It is an arithmetic number, because the mean of its divisors is an integer number (225570124).

Almost surely, 2^451140247 is an apocalyptic number.

451140247 is a deficient number, since it is larger than the sum of its proper divisors (1).

451140247 is an equidigital number, since it uses as much as digits as its factorization.

451140247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 451140247 is about 21240.0623115847. The cubic root of 451140247 is about 766.9561324293.

The spelling of 451140247 in words is "four hundred fifty-one million, one hundred forty thousand, two hundred forty-seven".